Stroke

The presence of antiphospholipid antibodies is associated with an increased risk for future cardiovascular events, according to a new study.

The findings point to possible new approaches to risk stratification and the potential for new therapeutic targets in heart disease.

“In this study of the general population, we found that two antiphospholipid antibodies were associated with an increased risk of having a serious cardiovascular event over a follow-up of 8 years,” coauthor Jason Knight, MD, University of Michigan, Ann Arbor, said in an interview.

“If confirmed in further studies, these findings could be used to identify a subgroup of patients who need more careful monitoring and more aggressive risk-factor modification, and if the increased risk linked to these antibodies is high enough, it may also justify preemptive treatments such as the anticoagulants that are routinely used in antiphospholipid syndrome,” Dr. Knight said.

“The long-term vision is that we may identify some people in the general population who would benefit from treating the immune system for the prevention and treatment of cardiovascular disease instead of, or in addition to, using typical cardiovascular medications,” he added.

The study was published online in JAMA Network Open.

Individuals with autoimmune and inflammatory diseases have a greater risk for cardiovascular events than expected based on traditional cardiovascular risk factors, with mechanisms proposed to explain this risk including inflammation-mediated disruption of vascular integrity and activation of platelets and coagulation pathways, the authors explained. However, the role of autoantibodies remains unclear.

They noted that antiphospholipid antibodies can activate endothelial cells, platelets, and neutrophils, and some patients with persistently circulating antiphospholipid antibodies can develop antiphospholipid syndrome – an acquired thromboinflammatory disease characterized by arterial, venous, and microvascular thrombotic events and obstetric complications.

Cross-sectional studies have shown that antiphospholipid antibodies are acutely present in up to 17.4% of patients with stroke or transient ischemic attack, and small cohort studies have suggested that such antibodies may be present in 1%-12% of seemingly healthy individuals. However, the impact of sex, race, and ethnicity on the prevalence of antiphospholipid antibodies and their association with atherosclerotic cardiovascular disease is not known.

The researchers conducted the current study to look at the association between antiphospholipid antibodies and future risk for atherosclerotic cardiovascular events.

They analyzed data from 2,427 participants in the population-based Dallas Heart Study who had no history of atherosclerotic cardiovascular disease or autoimmune diseases requiring immunosuppressive medications at the time of blood sampling at study entry in 2007-2009.

Eight different types of antiphospholipid antibodies were measured, and data on cardiovascular events over the next 8 years was recorded.

Results showed that 14.5% of the cohort tested positive for one of these antiphospholipid antibodies at the start of the study, with approximately one-third of those detected at a moderate or high titer.

The researchers also found that the IgA isotypes of two antiphospholipid antibodies – anticardiolipin and anti-beta-2 glycoprotein – were associated with future atherosclerotic cardiovascular events.

After adjustment for other known risk factors, individuals testing positive for the IgA isotype of anticardiolipin had an almost five times increased risk (hazard ratio, 4.92) of the primary endpoint (myocardial infarction, stroke, coronary revascularization, or cardiovascular death); while those testing positive for anti–beta₂-glycoprotein had an almost three times increased risk (HR, 2.91).

Furthermore, there was what appeared to be a dose effect. People with the highest levels of these antibodies also had the highest risk for cardiovascular events, with up to an almost 10-fold increased risk with the higher level of anticardiolipin. 

Dr. Knight said that more research into the IgA isotypes of these antiphospholipid antibodies is needed.

“Most of the mechanistic work in the antiphospholipid syndrome field has focused on IgG antiphospholipid antibodies. While we commonly find these IgA antibodies in patients with APS, the extent to which they contribute to disease has not been firmly established,” he said. “The fact that IgA was the primary hit in our unbiased screen suggests that there is more to the story and we need to better understand the implications of having these antibodies in circulation, and what specific problems they may be causing.”

Noting that antiphospholipid antibodies can form transiently after certain situations, such as infections, Dr. Knight said that further studies were needed with repeat blood testing to detect the chronic presence of the antibodies.

He added that information of venous thromboses was not available in this study and “perhaps some of the other antibodies might have stood out if we were able to analyze for different outcomes.”

This study was supported by a Pfizer Aspire Award. Dr. Knight reported receiving research funding and consulting fees from Jazz Pharmaceuticals outside the submitted work.

A version of this article first appeared on Medscape.com.

The presence of antiphospholipid antibodies is associated with an increased risk for future cardiovascular events, according to a new study.

The findings point to possible new approaches to risk stratification and the potential for new therapeutic targets in heart disease.

“In this study of the general population, we found that two antiphospholipid antibodies were associated with an increased risk of having a serious cardiovascular event over a follow-up of 8 years,” coauthor Jason Knight, MD, University of Michigan, Ann Arbor, said in an interview.

“If confirmed in further studies, these findings could be used to identify a subgroup of patients who need more careful monitoring and more aggressive risk-factor modification, and if the increased risk linked to these antibodies is high enough, it may also justify preemptive treatments such as the anticoagulants that are routinely used in antiphospholipid syndrome,” Dr. Knight said.

“The long-term vision is that we may identify some people in the general population who would benefit from treating the immune system for the prevention and treatment of cardiovascular disease instead of, or in addition to, using typical cardiovascular medications,” he added.

The study was published online in JAMA Network Open.

Individuals with autoimmune and inflammatory diseases have a greater risk for cardiovascular events than expected based on traditional cardiovascular risk factors, with mechanisms proposed to explain this risk including inflammation-mediated disruption of vascular integrity and activation of platelets and coagulation pathways, the authors explained. However, the role of autoantibodies remains unclear.

They noted that antiphospholipid antibodies can activate endothelial cells, platelets, and neutrophils, and some patients with persistently circulating antiphospholipid antibodies can develop antiphospholipid syndrome – an acquired thromboinflammatory disease characterized by arterial, venous, and microvascular thrombotic events and obstetric complications.

Cross-sectional studies have shown that antiphospholipid antibodies are acutely present in up to 17.4% of patients with stroke or transient ischemic attack, and small cohort studies have suggested that such antibodies may be present in 1%-12% of seemingly healthy individuals. However, the impact of sex, race, and ethnicity on the prevalence of antiphospholipid antibodies and their association with atherosclerotic cardiovascular disease is not known.

The researchers conducted the current study to look at the association between antiphospholipid antibodies and future risk for atherosclerotic cardiovascular events.

They analyzed data from 2,427 participants in the population-based Dallas Heart Study who had no history of atherosclerotic cardiovascular disease or autoimmune diseases requiring immunosuppressive medications at the time of blood sampling at study entry in 2007-2009.

Eight different types of antiphospholipid antibodies were measured, and data on cardiovascular events over the next 8 years was recorded.

Results showed that 14.5% of the cohort tested positive for one of these antiphospholipid antibodies at the start of the study, with approximately one-third of those detected at a moderate or high titer.

The researchers also found that the IgA isotypes of two antiphospholipid antibodies – anticardiolipin and anti-beta-2 glycoprotein – were associated with future atherosclerotic cardiovascular events.

After adjustment for other known risk factors, individuals testing positive for the IgA isotype of anticardiolipin had an almost five times increased risk (hazard ratio, 4.92) of the primary endpoint (myocardial infarction, stroke, coronary revascularization, or cardiovascular death); while those testing positive for anti–beta₂-glycoprotein had an almost three times increased risk (HR, 2.91).

Furthermore, there was what appeared to be a dose effect. People with the highest levels of these antibodies also had the highest risk for cardiovascular events, with up to an almost 10-fold increased risk with the higher level of anticardiolipin. 

Dr. Knight said that more research into the IgA isotypes of these antiphospholipid antibodies is needed.

“Most of the mechanistic work in the antiphospholipid syndrome field has focused on IgG antiphospholipid antibodies. While we commonly find these IgA antibodies in patients with APS, the extent to which they contribute to disease has not been firmly established,” he said. “The fact that IgA was the primary hit in our unbiased screen suggests that there is more to the story and we need to better understand the implications of having these antibodies in circulation, and what specific problems they may be causing.”

Noting that antiphospholipid antibodies can form transiently after certain situations, such as infections, Dr. Knight said that further studies were needed with repeat blood testing to detect the chronic presence of the antibodies.

He added that information of venous thromboses was not available in this study and “perhaps some of the other antibodies might have stood out if we were able to analyze for different outcomes.”

This study was supported by a Pfizer Aspire Award. Dr. Knight reported receiving research funding and consulting fees from Jazz Pharmaceuticals outside the submitted work.

A version of this article first appeared on Medscape.com.

The presence of antiphospholipid antibodies is associated with an increased risk for future cardiovascular events, according to a new study.

The findings point to possible new approaches to risk stratification and the potential for new therapeutic targets in heart disease.

“In this study of the general population, we found that two antiphospholipid antibodies were associated with an increased risk of having a serious cardiovascular event over a follow-up of 8 years,” coauthor Jason Knight, MD, University of Michigan, Ann Arbor, said in an interview.

“If confirmed in further studies, these findings could be used to identify a subgroup of patients who need more careful monitoring and more aggressive risk-factor modification, and if the increased risk linked to these antibodies is high enough, it may also justify preemptive treatments such as the anticoagulants that are routinely used in antiphospholipid syndrome,” Dr. Knight said.

“The long-term vision is that we may identify some people in the general population who would benefit from treating the immune system for the prevention and treatment of cardiovascular disease instead of, or in addition to, using typical cardiovascular medications,” he added.

The study was published online in JAMA Network Open.

Individuals with autoimmune and inflammatory diseases have a greater risk for cardiovascular events than expected based on traditional cardiovascular risk factors, with mechanisms proposed to explain this risk including inflammation-mediated disruption of vascular integrity and activation of platelets and coagulation pathways, the authors explained. However, the role of autoantibodies remains unclear.

They noted that antiphospholipid antibodies can activate endothelial cells, platelets, and neutrophils, and some patients with persistently circulating antiphospholipid antibodies can develop antiphospholipid syndrome – an acquired thromboinflammatory disease characterized by arterial, venous, and microvascular thrombotic events and obstetric complications.

Cross-sectional studies have shown that antiphospholipid antibodies are acutely present in up to 17.4% of patients with stroke or transient ischemic attack, and small cohort studies have suggested that such antibodies may be present in 1%-12% of seemingly healthy individuals. However, the impact of sex, race, and ethnicity on the prevalence of antiphospholipid antibodies and their association with atherosclerotic cardiovascular disease is not known.

The researchers conducted the current study to look at the association between antiphospholipid antibodies and future risk for atherosclerotic cardiovascular events.

They analyzed data from 2,427 participants in the population-based Dallas Heart Study who had no history of atherosclerotic cardiovascular disease or autoimmune diseases requiring immunosuppressive medications at the time of blood sampling at study entry in 2007-2009.

Eight different types of antiphospholipid antibodies were measured, and data on cardiovascular events over the next 8 years was recorded.

Results showed that 14.5% of the cohort tested positive for one of these antiphospholipid antibodies at the start of the study, with approximately one-third of those detected at a moderate or high titer.

The researchers also found that the IgA isotypes of two antiphospholipid antibodies – anticardiolipin and anti-beta-2 glycoprotein – were associated with future atherosclerotic cardiovascular events.

After adjustment for other known risk factors, individuals testing positive for the IgA isotype of anticardiolipin had an almost five times increased risk (hazard ratio, 4.92) of the primary endpoint (myocardial infarction, stroke, coronary revascularization, or cardiovascular death); while those testing positive for anti–beta₂-glycoprotein had an almost three times increased risk (HR, 2.91).

Furthermore, there was what appeared to be a dose effect. People with the highest levels of these antibodies also had the highest risk for cardiovascular events, with up to an almost 10-fold increased risk with the higher level of anticardiolipin. 

Dr. Knight said that more research into the IgA isotypes of these antiphospholipid antibodies is needed.

“Most of the mechanistic work in the antiphospholipid syndrome field has focused on IgG antiphospholipid antibodies. While we commonly find these IgA antibodies in patients with APS, the extent to which they contribute to disease has not been firmly established,” he said. “The fact that IgA was the primary hit in our unbiased screen suggests that there is more to the story and we need to better understand the implications of having these antibodies in circulation, and what specific problems they may be causing.”

Noting that antiphospholipid antibodies can form transiently after certain situations, such as infections, Dr. Knight said that further studies were needed with repeat blood testing to detect the chronic presence of the antibodies.

He added that information of venous thromboses was not available in this study and “perhaps some of the other antibodies might have stood out if we were able to analyze for different outcomes.”

This study was supported by a Pfizer Aspire Award. Dr. Knight reported receiving research funding and consulting fees from Jazz Pharmaceuticals outside the submitted work.

A version of this article first appeared on Medscape.com.

Disordered sleep is associated with a significantly increased risk for stroke, new research shows.

Results of a large international study show stroke risk was more than three times higher in those who slept too little, more than twice as high in those who sleep too much, and two to three times higher in those with symptoms of severe obstructive sleep apnea.

The study also showed that the greater the number of sleep disorder symptoms, the greater the stroke risk. The 11% of study participants with five or more symptoms of disordered sleep had a fivefold increased risk for stroke.

Jupiterimages/Thinkstock

More symptoms, more risk

Previous research shows severe OSA doubles the risk of stroke and increases the chance of recurrent stroke. A 2019 study showed that people with insomnia had a small increased risk of stroke.

“Both snoring and extremes of sleep duration have been previously associated with an increased risk of stroke in observational research, but less is known about other symptoms of sleep impairment, with less consistent findings,” Dr. McCarthy said.

Prior studies have also generally come from a single geographic region, which Dr. McCarthy noted could limit their generalizability.

For this effort, investigators used data from 4,496 participants in INTERSTROKE, an international case-control study of risk factors for a first acute stroke. About half of the participants had a history of stroke.

Using information collected from a survey of sleep habits, researchers found an elevated stroke risk in those who received less than 5 hours of sleep per night (odds ratio, 3.15; 95% confidence interval, 2.09-4.76) or more than 9 hours of sleep per night (OR, 2.67; 95% CI, 1.89-3.78), compared with those who slept 7 hours a night.

Participants who took unplanned naps or naps lasting an hour or more (OR, 2.46; 95% CI, 1.69-3.57) and participants who reported poor quality sleep (OR,1.52; 95% CI, 1.32-1.75) were also at an increased risk for stroke.

Symptoms of OSA were also strongly associated with increased stroke risk, including snoring (OR, 1.91; 95% CI, 1.62-2.24), snorting (OR, 2.64; 95% CI, 2.17-3.20), and breathing cessation (OR, 2.87; 95% CI, 2.28-2.60).

Stroke risk increased as the number of sleep disturbance symptoms rose, with the greatest risk in the 11% of participants who had five or more symptoms (OR, 5.38; 95% CI, 4.03-7.18).

“This study finds an association between a broad range of sleep impairment symptoms and stroke, and a graded association with increasing symptoms, in an international setting,” Dr. McCarthy said.

Researchers aren’t sure what’s driving the higher stroke risk among people with sleep disturbances. Although the study did control for potential confounders, it wasn’t designed to get at what’s driving the association.

“Sleep disturbance may also have a bi-directional relationship with many stroke risk factors; for example, sleep disturbance may be a symptom of disease and exacerbate disease,” Dr. McCarthy said. “Future interventional studies are required to determine the true direction of the relationship.”
 

A marker of stroke risk

Daniel Lackland, DrPH, professor of neurology at the Medical University of South Carolina, Charleston, said the findings provide additional evidence of the link between sleep and stroke risk.

“The results confirm sleep disorders as a potential marker and part of the risk profile,” he said.

Collecting information about sleep using a validated assessment tool is an important piece of clinical care, Dr. Lackland said, especially among patients with other stroke risk factors.

One limitation of the study was that data on sleep was collected only at one point, and participants were not followed over time to see if changes in sleep affected stroke risk.

“This is an important point and should be a focus for future studies, as it is critical in the design of interventions,” Dr. Lackland said.

The INTERSTROKE study is funded by the Canadian Institutes of Health Research, Heart and Stroke Foundation of Canada, Canadian Stroke Network, Swedish Research Council, Swedish Heart and Lung Foundation, The Health & Medical Care Committee of the Regional Executive Board, Region Västra Götaland, Astra Zeneca, Boehringer Ingelheim (Canada), Pfizer (Canada), MERCK, Sharp and Dohme, Swedish Heart and Lung Foundation, U.K. Chest, and U.K. Heart and Stroke. Dr. McCarthy and Lackland report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Disordered sleep is associated with a significantly increased risk for stroke, new research shows.

Results of a large international study show stroke risk was more than three times higher in those who slept too little, more than twice as high in those who sleep too much, and two to three times higher in those with symptoms of severe obstructive sleep apnea.

The study also showed that the greater the number of sleep disorder symptoms, the greater the stroke risk. The 11% of study participants with five or more symptoms of disordered sleep had a fivefold increased risk for stroke.

Jupiterimages/Thinkstock

More symptoms, more risk

Previous research shows severe OSA doubles the risk of stroke and increases the chance of recurrent stroke. A 2019 study showed that people with insomnia had a small increased risk of stroke.

“Both snoring and extremes of sleep duration have been previously associated with an increased risk of stroke in observational research, but less is known about other symptoms of sleep impairment, with less consistent findings,” Dr. McCarthy said.

Prior studies have also generally come from a single geographic region, which Dr. McCarthy noted could limit their generalizability.

For this effort, investigators used data from 4,496 participants in INTERSTROKE, an international case-control study of risk factors for a first acute stroke. About half of the participants had a history of stroke.

Using information collected from a survey of sleep habits, researchers found an elevated stroke risk in those who received less than 5 hours of sleep per night (odds ratio, 3.15; 95% confidence interval, 2.09-4.76) or more than 9 hours of sleep per night (OR, 2.67; 95% CI, 1.89-3.78), compared with those who slept 7 hours a night.

Participants who took unplanned naps or naps lasting an hour or more (OR, 2.46; 95% CI, 1.69-3.57) and participants who reported poor quality sleep (OR,1.52; 95% CI, 1.32-1.75) were also at an increased risk for stroke.

Symptoms of OSA were also strongly associated with increased stroke risk, including snoring (OR, 1.91; 95% CI, 1.62-2.24), snorting (OR, 2.64; 95% CI, 2.17-3.20), and breathing cessation (OR, 2.87; 95% CI, 2.28-2.60).

Stroke risk increased as the number of sleep disturbance symptoms rose, with the greatest risk in the 11% of participants who had five or more symptoms (OR, 5.38; 95% CI, 4.03-7.18).

“This study finds an association between a broad range of sleep impairment symptoms and stroke, and a graded association with increasing symptoms, in an international setting,” Dr. McCarthy said.

Researchers aren’t sure what’s driving the higher stroke risk among people with sleep disturbances. Although the study did control for potential confounders, it wasn’t designed to get at what’s driving the association.

“Sleep disturbance may also have a bi-directional relationship with many stroke risk factors; for example, sleep disturbance may be a symptom of disease and exacerbate disease,” Dr. McCarthy said. “Future interventional studies are required to determine the true direction of the relationship.”
 

A marker of stroke risk

Daniel Lackland, DrPH, professor of neurology at the Medical University of South Carolina, Charleston, said the findings provide additional evidence of the link between sleep and stroke risk.

“The results confirm sleep disorders as a potential marker and part of the risk profile,” he said.

Collecting information about sleep using a validated assessment tool is an important piece of clinical care, Dr. Lackland said, especially among patients with other stroke risk factors.

One limitation of the study was that data on sleep was collected only at one point, and participants were not followed over time to see if changes in sleep affected stroke risk.

“This is an important point and should be a focus for future studies, as it is critical in the design of interventions,” Dr. Lackland said.

The INTERSTROKE study is funded by the Canadian Institutes of Health Research, Heart and Stroke Foundation of Canada, Canadian Stroke Network, Swedish Research Council, Swedish Heart and Lung Foundation, The Health & Medical Care Committee of the Regional Executive Board, Region Västra Götaland, Astra Zeneca, Boehringer Ingelheim (Canada), Pfizer (Canada), MERCK, Sharp and Dohme, Swedish Heart and Lung Foundation, U.K. Chest, and U.K. Heart and Stroke. Dr. McCarthy and Lackland report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Disordered sleep is associated with a significantly increased risk for stroke, new research shows.

Results of a large international study show stroke risk was more than three times higher in those who slept too little, more than twice as high in those who sleep too much, and two to three times higher in those with symptoms of severe obstructive sleep apnea.

The study also showed that the greater the number of sleep disorder symptoms, the greater the stroke risk. The 11% of study participants with five or more symptoms of disordered sleep had a fivefold increased risk for stroke.

Jupiterimages/Thinkstock

More symptoms, more risk

Previous research shows severe OSA doubles the risk of stroke and increases the chance of recurrent stroke. A 2019 study showed that people with insomnia had a small increased risk of stroke.

“Both snoring and extremes of sleep duration have been previously associated with an increased risk of stroke in observational research, but less is known about other symptoms of sleep impairment, with less consistent findings,” Dr. McCarthy said.

Prior studies have also generally come from a single geographic region, which Dr. McCarthy noted could limit their generalizability.

For this effort, investigators used data from 4,496 participants in INTERSTROKE, an international case-control study of risk factors for a first acute stroke. About half of the participants had a history of stroke.

Using information collected from a survey of sleep habits, researchers found an elevated stroke risk in those who received less than 5 hours of sleep per night (odds ratio, 3.15; 95% confidence interval, 2.09-4.76) or more than 9 hours of sleep per night (OR, 2.67; 95% CI, 1.89-3.78), compared with those who slept 7 hours a night.

Participants who took unplanned naps or naps lasting an hour or more (OR, 2.46; 95% CI, 1.69-3.57) and participants who reported poor quality sleep (OR,1.52; 95% CI, 1.32-1.75) were also at an increased risk for stroke.

Symptoms of OSA were also strongly associated with increased stroke risk, including snoring (OR, 1.91; 95% CI, 1.62-2.24), snorting (OR, 2.64; 95% CI, 2.17-3.20), and breathing cessation (OR, 2.87; 95% CI, 2.28-2.60).

Stroke risk increased as the number of sleep disturbance symptoms rose, with the greatest risk in the 11% of participants who had five or more symptoms (OR, 5.38; 95% CI, 4.03-7.18).

“This study finds an association between a broad range of sleep impairment symptoms and stroke, and a graded association with increasing symptoms, in an international setting,” Dr. McCarthy said.

Researchers aren’t sure what’s driving the higher stroke risk among people with sleep disturbances. Although the study did control for potential confounders, it wasn’t designed to get at what’s driving the association.

“Sleep disturbance may also have a bi-directional relationship with many stroke risk factors; for example, sleep disturbance may be a symptom of disease and exacerbate disease,” Dr. McCarthy said. “Future interventional studies are required to determine the true direction of the relationship.”
 

A marker of stroke risk

Daniel Lackland, DrPH, professor of neurology at the Medical University of South Carolina, Charleston, said the findings provide additional evidence of the link between sleep and stroke risk.

“The results confirm sleep disorders as a potential marker and part of the risk profile,” he said.

Collecting information about sleep using a validated assessment tool is an important piece of clinical care, Dr. Lackland said, especially among patients with other stroke risk factors.

One limitation of the study was that data on sleep was collected only at one point, and participants were not followed over time to see if changes in sleep affected stroke risk.

“This is an important point and should be a focus for future studies, as it is critical in the design of interventions,” Dr. Lackland said.

The INTERSTROKE study is funded by the Canadian Institutes of Health Research, Heart and Stroke Foundation of Canada, Canadian Stroke Network, Swedish Research Council, Swedish Heart and Lung Foundation, The Health & Medical Care Committee of the Regional Executive Board, Region Västra Götaland, Astra Zeneca, Boehringer Ingelheim (Canada), Pfizer (Canada), MERCK, Sharp and Dohme, Swedish Heart and Lung Foundation, U.K. Chest, and U.K. Heart and Stroke. Dr. McCarthy and Lackland report no relevant financial relationships.

A version of this article first appeared on Medscape.com.

An updated consensus statement on transcatheter left atrial appendage closure (LAAC) has put a newfound focus on patient selection for the procedure, specifically recommending that the procedure is appropriate for patients with nonvalvular atrial fibrillation who have risk for thromboembolism, aren’t well suited for direct oral anticoagulants (DOACs) and have a good chance of living for at least another year.

The statement, published online in the Journal of the Society for Cardiovascular Angiography & Interventions, also makes recommendations for how much experience operators should have, how many procedures they should perform to keep their skills up, and when and how to use imaging and prescribe DOACs, among other suggestions.

The statement represents the first updated guidance for LAAC since 2015. “Since then this field has really expanded and evolved,” writing group chair Jacqueline Saw, MD, said in an interview. “For instance, the indications are more matured and specific, and the procedural technical steps have matured. Imaging has also advanced, there’s more understanding about postprocedural care and there are also new devices that have been approved.”

Dr. Saw, an interventional cardiologist at Vancouver General Hospital and St. Paul’s Hospital, and a professor at the University of British Columbia in Vancouver, called the statement “a piece that puts everything together.”

“This document really summarizes the whole practice for doing transcatheter procedures,” she added, “so it’s all-in-one document in terms of recommendation of who we do the procedure for, how we should do it, how we should image and guide the procedure, and what complications to look out for and how to manage patients post procedure, be it with antithrombotic therapy and/or device surveillance.”

 13 recommendations

In all, the statement carries 13 recommendations for LAAC. The Society for Cardiovascular Angiography & Interventions and the Heart Rhythm Society commissioned the writing group. The American College of Cardiology and Society of Cardiovascular Computed Tomography have endorsed the statement. The following are among the recommendations:

• Transcatheter LAAC is appropriate for patients with nonvalvular atrial fibrillation with high thromboembolic risk but for whom long-term oral anticoagulation may be contraindicated and who have at least 1 year’s life expectancy.
• Operators should have performed at least 50 prior left-sided ablations or structural procedures and at least 25 transseptal punctures (TSPs). Interventional-imaging physicians should have experience in guiding 25 or more TSPs before supporting LAAC procedures independently.
• To maintain skills, operators should do 25 or more TSPs and at least 12 LAACs over each 2-year period.
• On-site cardiovascular surgery backup should be available for new programs and for operators early in their learning curve.
• Baseline imaging with transesophageal echocardiography (TEE) or cardiac computed tomography should be performed before LAAC.
• Intraprocedural imaging guidance with TEE or intracardiac echocardiography.
• Follow labeling of each specific LAAC device for technical aspects of the procedure.
• Familiarity with avoiding, recognizing, and managing LAAC complications.
• Predischarge 2-dimensional TEE to rule out pericardial effusion and device embolization.
• Anticoagulation for device-related thrombus.
• Make all efforts to minimize peridevice leaks during implantation because their clinical impact and management isn’t well understood.
• Antithrombotic therapy with warfarin, DOAC, or dual-antiplatelet therapy after LAAC based on the studied regimen and instructions for each specific device, tailored to the bleeding risks for each patient.
• TEE or cardiac computed tomography at 45-90 days after LAAC for device surveillance to assess for peridevice leak and device-related thrombus.

The statement also includes precautionary recommendations. It advises against using routine closure of LAAC-associated iatrogenic atrial septal defects and states that combined procedures with LAAC, such as structural interventions and pulmonary vein isolation, should be avoided because randomized controlled trial data are pending.

“These recommendations are based upon data from updated publications and randomized trial data as well as large registries, including the National Cardiovascular Data Registry, so I think this is a very practical statement that puts all these pieces together for any budding interventionalist doing this procedure and even experienced operations,” Dr. Saw said.

Authors of an accompanying editorial agreed that the “rigorous standards” set out in the statement will help maintain “a high level of procedural safety in the setting of rapid expansion.”

The editorialists, Faisal M. Merchant, MD, of Emory University, Atlanta, and Mohamad Alkhouli, MD, professor of medicine at Mayo Clinic School of Medicine, Rochester, Minn., point out that the incidence of pericardial effusion has decreased from more than 5% in the pivotal Watchman trials to less than 1.5% in the most recent report from the National Cardiovascular Data Registry, which shows that more than 100,000 procedures have been performed in the United States.

But most important as the field moves forward, they stress, is patient selection. The recommendation of limiting patients to those with a life expectancy of 1 year “is a tacit recognition of the fact that the benefits of LAAC take time to accrue, and many older and frail patients are unlikely to derive meaningful benefit.”

Dr. Merchant and Dr. Alkhouli also note that there remains a conundrum in patient selection that remains from the original LAAC trials, which enrolled patients who were eligible for anticoagulation. “Somewhat paradoxically, after its approval, LAAC is mostly prescribed to patients who are not felt to be good anticoagulation candidates.” This leaves physicians “in the precarious position of extrapolating data to patients who were excluded from the original clinical trials.”

Therefore, the consensus statement “is right to put patient selection front and center in its recommendations, but as the field of LAAC comes of age, better evidence to support patient selection will be the real sign of maturity.”

Dr. Saw said she envisions another update over the next 2 years or so as ongoing clinical trials comparing DOAC and LAAC, namely the CHAMPION-AF and OPTION trials, report results.

Dr. Saw and Dr. Merchant, reported no conflicts of interest. Dr. Alkhouli has financial ties to Boston Scientific, Abbott, and Philips.

An updated consensus statement on transcatheter left atrial appendage closure (LAAC) has put a newfound focus on patient selection for the procedure, specifically recommending that the procedure is appropriate for patients with nonvalvular atrial fibrillation who have risk for thromboembolism, aren’t well suited for direct oral anticoagulants (DOACs) and have a good chance of living for at least another year.

The statement, published online in the Journal of the Society for Cardiovascular Angiography & Interventions, also makes recommendations for how much experience operators should have, how many procedures they should perform to keep their skills up, and when and how to use imaging and prescribe DOACs, among other suggestions.

The statement represents the first updated guidance for LAAC since 2015. “Since then this field has really expanded and evolved,” writing group chair Jacqueline Saw, MD, said in an interview. “For instance, the indications are more matured and specific, and the procedural technical steps have matured. Imaging has also advanced, there’s more understanding about postprocedural care and there are also new devices that have been approved.”

Dr. Saw, an interventional cardiologist at Vancouver General Hospital and St. Paul’s Hospital, and a professor at the University of British Columbia in Vancouver, called the statement “a piece that puts everything together.”

“This document really summarizes the whole practice for doing transcatheter procedures,” she added, “so it’s all-in-one document in terms of recommendation of who we do the procedure for, how we should do it, how we should image and guide the procedure, and what complications to look out for and how to manage patients post procedure, be it with antithrombotic therapy and/or device surveillance.”

 13 recommendations

In all, the statement carries 13 recommendations for LAAC. The Society for Cardiovascular Angiography & Interventions and the Heart Rhythm Society commissioned the writing group. The American College of Cardiology and Society of Cardiovascular Computed Tomography have endorsed the statement. The following are among the recommendations:

• Transcatheter LAAC is appropriate for patients with nonvalvular atrial fibrillation with high thromboembolic risk but for whom long-term oral anticoagulation may be contraindicated and who have at least 1 year’s life expectancy.
• Operators should have performed at least 50 prior left-sided ablations or structural procedures and at least 25 transseptal punctures (TSPs). Interventional-imaging physicians should have experience in guiding 25 or more TSPs before supporting LAAC procedures independently.
• To maintain skills, operators should do 25 or more TSPs and at least 12 LAACs over each 2-year period.
• On-site cardiovascular surgery backup should be available for new programs and for operators early in their learning curve.
• Baseline imaging with transesophageal echocardiography (TEE) or cardiac computed tomography should be performed before LAAC.
• Intraprocedural imaging guidance with TEE or intracardiac echocardiography.
• Follow labeling of each specific LAAC device for technical aspects of the procedure.
• Familiarity with avoiding, recognizing, and managing LAAC complications.
• Predischarge 2-dimensional TEE to rule out pericardial effusion and device embolization.
• Anticoagulation for device-related thrombus.
• Make all efforts to minimize peridevice leaks during implantation because their clinical impact and management isn’t well understood.
• Antithrombotic therapy with warfarin, DOAC, or dual-antiplatelet therapy after LAAC based on the studied regimen and instructions for each specific device, tailored to the bleeding risks for each patient.
• TEE or cardiac computed tomography at 45-90 days after LAAC for device surveillance to assess for peridevice leak and device-related thrombus.

The statement also includes precautionary recommendations. It advises against using routine closure of LAAC-associated iatrogenic atrial septal defects and states that combined procedures with LAAC, such as structural interventions and pulmonary vein isolation, should be avoided because randomized controlled trial data are pending.

“These recommendations are based upon data from updated publications and randomized trial data as well as large registries, including the National Cardiovascular Data Registry, so I think this is a very practical statement that puts all these pieces together for any budding interventionalist doing this procedure and even experienced operations,” Dr. Saw said.

Authors of an accompanying editorial agreed that the “rigorous standards” set out in the statement will help maintain “a high level of procedural safety in the setting of rapid expansion.”

The editorialists, Faisal M. Merchant, MD, of Emory University, Atlanta, and Mohamad Alkhouli, MD, professor of medicine at Mayo Clinic School of Medicine, Rochester, Minn., point out that the incidence of pericardial effusion has decreased from more than 5% in the pivotal Watchman trials to less than 1.5% in the most recent report from the National Cardiovascular Data Registry, which shows that more than 100,000 procedures have been performed in the United States.

But most important as the field moves forward, they stress, is patient selection. The recommendation of limiting patients to those with a life expectancy of 1 year “is a tacit recognition of the fact that the benefits of LAAC take time to accrue, and many older and frail patients are unlikely to derive meaningful benefit.”

Dr. Merchant and Dr. Alkhouli also note that there remains a conundrum in patient selection that remains from the original LAAC trials, which enrolled patients who were eligible for anticoagulation. “Somewhat paradoxically, after its approval, LAAC is mostly prescribed to patients who are not felt to be good anticoagulation candidates.” This leaves physicians “in the precarious position of extrapolating data to patients who were excluded from the original clinical trials.”

Therefore, the consensus statement “is right to put patient selection front and center in its recommendations, but as the field of LAAC comes of age, better evidence to support patient selection will be the real sign of maturity.”

Dr. Saw said she envisions another update over the next 2 years or so as ongoing clinical trials comparing DOAC and LAAC, namely the CHAMPION-AF and OPTION trials, report results.

Dr. Saw and Dr. Merchant, reported no conflicts of interest. Dr. Alkhouli has financial ties to Boston Scientific, Abbott, and Philips.

An updated consensus statement on transcatheter left atrial appendage closure (LAAC) has put a newfound focus on patient selection for the procedure, specifically recommending that the procedure is appropriate for patients with nonvalvular atrial fibrillation who have risk for thromboembolism, aren’t well suited for direct oral anticoagulants (DOACs) and have a good chance of living for at least another year.

The statement, published online in the Journal of the Society for Cardiovascular Angiography & Interventions, also makes recommendations for how much experience operators should have, how many procedures they should perform to keep their skills up, and when and how to use imaging and prescribe DOACs, among other suggestions.

The statement represents the first updated guidance for LAAC since 2015. “Since then this field has really expanded and evolved,” writing group chair Jacqueline Saw, MD, said in an interview. “For instance, the indications are more matured and specific, and the procedural technical steps have matured. Imaging has also advanced, there’s more understanding about postprocedural care and there are also new devices that have been approved.”

Dr. Saw, an interventional cardiologist at Vancouver General Hospital and St. Paul’s Hospital, and a professor at the University of British Columbia in Vancouver, called the statement “a piece that puts everything together.”

“This document really summarizes the whole practice for doing transcatheter procedures,” she added, “so it’s all-in-one document in terms of recommendation of who we do the procedure for, how we should do it, how we should image and guide the procedure, and what complications to look out for and how to manage patients post procedure, be it with antithrombotic therapy and/or device surveillance.”

 13 recommendations

In all, the statement carries 13 recommendations for LAAC. The Society for Cardiovascular Angiography & Interventions and the Heart Rhythm Society commissioned the writing group. The American College of Cardiology and Society of Cardiovascular Computed Tomography have endorsed the statement. The following are among the recommendations:

• Transcatheter LAAC is appropriate for patients with nonvalvular atrial fibrillation with high thromboembolic risk but for whom long-term oral anticoagulation may be contraindicated and who have at least 1 year’s life expectancy.
• Operators should have performed at least 50 prior left-sided ablations or structural procedures and at least 25 transseptal punctures (TSPs). Interventional-imaging physicians should have experience in guiding 25 or more TSPs before supporting LAAC procedures independently.
• To maintain skills, operators should do 25 or more TSPs and at least 12 LAACs over each 2-year period.
• On-site cardiovascular surgery backup should be available for new programs and for operators early in their learning curve.
• Baseline imaging with transesophageal echocardiography (TEE) or cardiac computed tomography should be performed before LAAC.
• Intraprocedural imaging guidance with TEE or intracardiac echocardiography.
• Follow labeling of each specific LAAC device for technical aspects of the procedure.
• Familiarity with avoiding, recognizing, and managing LAAC complications.
• Predischarge 2-dimensional TEE to rule out pericardial effusion and device embolization.
• Anticoagulation for device-related thrombus.
• Make all efforts to minimize peridevice leaks during implantation because their clinical impact and management isn’t well understood.
• Antithrombotic therapy with warfarin, DOAC, or dual-antiplatelet therapy after LAAC based on the studied regimen and instructions for each specific device, tailored to the bleeding risks for each patient.
• TEE or cardiac computed tomography at 45-90 days after LAAC for device surveillance to assess for peridevice leak and device-related thrombus.

The statement also includes precautionary recommendations. It advises against using routine closure of LAAC-associated iatrogenic atrial septal defects and states that combined procedures with LAAC, such as structural interventions and pulmonary vein isolation, should be avoided because randomized controlled trial data are pending.

“These recommendations are based upon data from updated publications and randomized trial data as well as large registries, including the National Cardiovascular Data Registry, so I think this is a very practical statement that puts all these pieces together for any budding interventionalist doing this procedure and even experienced operations,” Dr. Saw said.

Authors of an accompanying editorial agreed that the “rigorous standards” set out in the statement will help maintain “a high level of procedural safety in the setting of rapid expansion.”

The editorialists, Faisal M. Merchant, MD, of Emory University, Atlanta, and Mohamad Alkhouli, MD, professor of medicine at Mayo Clinic School of Medicine, Rochester, Minn., point out that the incidence of pericardial effusion has decreased from more than 5% in the pivotal Watchman trials to less than 1.5% in the most recent report from the National Cardiovascular Data Registry, which shows that more than 100,000 procedures have been performed in the United States.

But most important as the field moves forward, they stress, is patient selection. The recommendation of limiting patients to those with a life expectancy of 1 year “is a tacit recognition of the fact that the benefits of LAAC take time to accrue, and many older and frail patients are unlikely to derive meaningful benefit.”

Dr. Merchant and Dr. Alkhouli also note that there remains a conundrum in patient selection that remains from the original LAAC trials, which enrolled patients who were eligible for anticoagulation. “Somewhat paradoxically, after its approval, LAAC is mostly prescribed to patients who are not felt to be good anticoagulation candidates.” This leaves physicians “in the precarious position of extrapolating data to patients who were excluded from the original clinical trials.”

Therefore, the consensus statement “is right to put patient selection front and center in its recommendations, but as the field of LAAC comes of age, better evidence to support patient selection will be the real sign of maturity.”

Dr. Saw said she envisions another update over the next 2 years or so as ongoing clinical trials comparing DOAC and LAAC, namely the CHAMPION-AF and OPTION trials, report results.

Dr. Saw and Dr. Merchant, reported no conflicts of interest. Dr. Alkhouli has financial ties to Boston Scientific, Abbott, and Philips.

Younger people who experience stroke or intracerebral hemorrhage have about a three- to fivefold increased risk of being diagnosed with cancer in the next few years, new research shows.

In young people, stroke might be the first manifestation of an underlying cancer, according to the investigators, led by Jamie Verhoeven, MD, PhD, with the department of neurology, Radboud University Medical Centre, Nijmegen, the Netherlands.

The new study can be viewed as a “stepping stone for future studies investigating the usefulness of screening for cancer after stroke,” the researchers say.

The study was published online in JAMA Network Open.

Currently, the diagnostic workup for young people with stroke includes searching for rare clotting disorders, although screening for cancer is not regularly performed.

Some research suggests that stroke and cancer are linked, but the literature is limited. In prior studies among people of all ages, cancer incidence after stroke has been variable – from 1% to 5% at 1 year and from 11% to 30% after 10 years.

To the team’s knowledge, only two studies have described the incidence of cancer after stroke among younger patients. One put the risk at 0.5% for people aged 18-50 years in the first year after stroke; the other described a cumulative risk of 17.3% in the 10 years after stroke for patients aged 18-55 years.

Using Dutch data, Dr. Verhoeven and colleagues identified 27,616 young stroke patients (age, 15-49 years; median age, 45 years) and 362,782 older stroke patients (median age, 76 years).

The cumulative incidence of any new cancer at 10 years was 3.7% among the younger stroke patients and 8.5% among the older stroke patients.

The incidence of a new cancer after stroke among younger patients was higher among women than men, while the opposite was true for older stroke patients.

Compared with the general population, younger stroke patients had a more than 2.5-fold greater likelihood of being diagnosed with a new cancer in the first year after ischemic stroke (standardized incidence ratio, 2.6). The risk was highest for lung cancer (SIR, 6.9), followed by hematologic cancers (SIR, 5.2).

Compared with the general population, younger stroke patients had nearly a 5.5-fold greater likelihood of being diagnosed with a new cancer in the first year after intracerebral hemorrhage (SIR, 5.4), and the risk was highest for hematologic cancers (SIR, 14.2).

In younger patients, the cumulative incidence of any cancer decreased over the years but remained significantly higher for 8 years following a stroke.

For patients aged 50 years or older, the 1-year risk for any new cancer after either ischemic stroke or intracerebral hemorrhage was 1.2 times higher, compared with the general population.

“We typically think of occult cancer as being a cause of stroke in an older population, given that the incidence of cancer increases over time [but] what this study shows is that we probably do need to consider occult cancer as an underlying cause of stroke even in a younger population,” said Laura Gioia, MD, stroke neurologist at the University of Montreal, who was not involved in the research.

Dr. Verhoeven and colleagues conclude that their finding supports the hypothesis of a causal link between cancer and stroke. Given the timing between stroke and cancer diagnosis, cancer may have been present when the stroke occurred and possibly played a role in causing it, the authors note. However, conclusions on causal mechanisms cannot be drawn from the current study.

The question of whether young stroke patients should be screened for cancer is a tough one, Dr. Gioia noted. “Cancer represents a small percentage of causes of stroke. That means you would have to screen a lot of people with a benefit that is still uncertain for the moment,” Dr. Gioia said in an interview.

“I think we need to keep cancer in mind as a cause of stroke in our young patients, and that should probably guide our history-taking with the patient and consider imaging when it’s appropriate and when we think that there could be an underlying occult cancer,” Dr. Gioia suggested.

The study was funded in part through unrestricted funding by Stryker, Medtronic, and Cerenovus. Dr. Verhoeven and Dr. Gioia have disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Younger people who experience stroke or intracerebral hemorrhage have about a three- to fivefold increased risk of being diagnosed with cancer in the next few years, new research shows.

In young people, stroke might be the first manifestation of an underlying cancer, according to the investigators, led by Jamie Verhoeven, MD, PhD, with the department of neurology, Radboud University Medical Centre, Nijmegen, the Netherlands.

The new study can be viewed as a “stepping stone for future studies investigating the usefulness of screening for cancer after stroke,” the researchers say.

The study was published online in JAMA Network Open.

Currently, the diagnostic workup for young people with stroke includes searching for rare clotting disorders, although screening for cancer is not regularly performed.

Some research suggests that stroke and cancer are linked, but the literature is limited. In prior studies among people of all ages, cancer incidence after stroke has been variable – from 1% to 5% at 1 year and from 11% to 30% after 10 years.

To the team’s knowledge, only two studies have described the incidence of cancer after stroke among younger patients. One put the risk at 0.5% for people aged 18-50 years in the first year after stroke; the other described a cumulative risk of 17.3% in the 10 years after stroke for patients aged 18-55 years.

Using Dutch data, Dr. Verhoeven and colleagues identified 27,616 young stroke patients (age, 15-49 years; median age, 45 years) and 362,782 older stroke patients (median age, 76 years).

The cumulative incidence of any new cancer at 10 years was 3.7% among the younger stroke patients and 8.5% among the older stroke patients.

The incidence of a new cancer after stroke among younger patients was higher among women than men, while the opposite was true for older stroke patients.

Compared with the general population, younger stroke patients had a more than 2.5-fold greater likelihood of being diagnosed with a new cancer in the first year after ischemic stroke (standardized incidence ratio, 2.6). The risk was highest for lung cancer (SIR, 6.9), followed by hematologic cancers (SIR, 5.2).

Compared with the general population, younger stroke patients had nearly a 5.5-fold greater likelihood of being diagnosed with a new cancer in the first year after intracerebral hemorrhage (SIR, 5.4), and the risk was highest for hematologic cancers (SIR, 14.2).

In younger patients, the cumulative incidence of any cancer decreased over the years but remained significantly higher for 8 years following a stroke.

For patients aged 50 years or older, the 1-year risk for any new cancer after either ischemic stroke or intracerebral hemorrhage was 1.2 times higher, compared with the general population.

“We typically think of occult cancer as being a cause of stroke in an older population, given that the incidence of cancer increases over time [but] what this study shows is that we probably do need to consider occult cancer as an underlying cause of stroke even in a younger population,” said Laura Gioia, MD, stroke neurologist at the University of Montreal, who was not involved in the research.

Dr. Verhoeven and colleagues conclude that their finding supports the hypothesis of a causal link between cancer and stroke. Given the timing between stroke and cancer diagnosis, cancer may have been present when the stroke occurred and possibly played a role in causing it, the authors note. However, conclusions on causal mechanisms cannot be drawn from the current study.

The question of whether young stroke patients should be screened for cancer is a tough one, Dr. Gioia noted. “Cancer represents a small percentage of causes of stroke. That means you would have to screen a lot of people with a benefit that is still uncertain for the moment,” Dr. Gioia said in an interview.

“I think we need to keep cancer in mind as a cause of stroke in our young patients, and that should probably guide our history-taking with the patient and consider imaging when it’s appropriate and when we think that there could be an underlying occult cancer,” Dr. Gioia suggested.

The study was funded in part through unrestricted funding by Stryker, Medtronic, and Cerenovus. Dr. Verhoeven and Dr. Gioia have disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Younger people who experience stroke or intracerebral hemorrhage have about a three- to fivefold increased risk of being diagnosed with cancer in the next few years, new research shows.

In young people, stroke might be the first manifestation of an underlying cancer, according to the investigators, led by Jamie Verhoeven, MD, PhD, with the department of neurology, Radboud University Medical Centre, Nijmegen, the Netherlands.

The new study can be viewed as a “stepping stone for future studies investigating the usefulness of screening for cancer after stroke,” the researchers say.

The study was published online in JAMA Network Open.

Currently, the diagnostic workup for young people with stroke includes searching for rare clotting disorders, although screening for cancer is not regularly performed.

Some research suggests that stroke and cancer are linked, but the literature is limited. In prior studies among people of all ages, cancer incidence after stroke has been variable – from 1% to 5% at 1 year and from 11% to 30% after 10 years.

To the team’s knowledge, only two studies have described the incidence of cancer after stroke among younger patients. One put the risk at 0.5% for people aged 18-50 years in the first year after stroke; the other described a cumulative risk of 17.3% in the 10 years after stroke for patients aged 18-55 years.

Using Dutch data, Dr. Verhoeven and colleagues identified 27,616 young stroke patients (age, 15-49 years; median age, 45 years) and 362,782 older stroke patients (median age, 76 years).

The cumulative incidence of any new cancer at 10 years was 3.7% among the younger stroke patients and 8.5% among the older stroke patients.

The incidence of a new cancer after stroke among younger patients was higher among women than men, while the opposite was true for older stroke patients.

Compared with the general population, younger stroke patients had a more than 2.5-fold greater likelihood of being diagnosed with a new cancer in the first year after ischemic stroke (standardized incidence ratio, 2.6). The risk was highest for lung cancer (SIR, 6.9), followed by hematologic cancers (SIR, 5.2).

Compared with the general population, younger stroke patients had nearly a 5.5-fold greater likelihood of being diagnosed with a new cancer in the first year after intracerebral hemorrhage (SIR, 5.4), and the risk was highest for hematologic cancers (SIR, 14.2).

In younger patients, the cumulative incidence of any cancer decreased over the years but remained significantly higher for 8 years following a stroke.

For patients aged 50 years or older, the 1-year risk for any new cancer after either ischemic stroke or intracerebral hemorrhage was 1.2 times higher, compared with the general population.

“We typically think of occult cancer as being a cause of stroke in an older population, given that the incidence of cancer increases over time [but] what this study shows is that we probably do need to consider occult cancer as an underlying cause of stroke even in a younger population,” said Laura Gioia, MD, stroke neurologist at the University of Montreal, who was not involved in the research.

Dr. Verhoeven and colleagues conclude that their finding supports the hypothesis of a causal link between cancer and stroke. Given the timing between stroke and cancer diagnosis, cancer may have been present when the stroke occurred and possibly played a role in causing it, the authors note. However, conclusions on causal mechanisms cannot be drawn from the current study.

The question of whether young stroke patients should be screened for cancer is a tough one, Dr. Gioia noted. “Cancer represents a small percentage of causes of stroke. That means you would have to screen a lot of people with a benefit that is still uncertain for the moment,” Dr. Gioia said in an interview.

“I think we need to keep cancer in mind as a cause of stroke in our young patients, and that should probably guide our history-taking with the patient and consider imaging when it’s appropriate and when we think that there could be an underlying occult cancer,” Dr. Gioia suggested.

The study was funded in part through unrestricted funding by Stryker, Medtronic, and Cerenovus. Dr. Verhoeven and Dr. Gioia have disclosed no relevant financial relationships.

A version of this article first appeared on Medscape.com.

HAMBURG, GERMANY – Around 86 billion nerve cells in our brain work together in complex dynamic networks to control almost every sensorimotor and cognitive process. However, the way in which the information is processed in the different regions of the brain is still unclear. There are already some promising approaches to specifically influence the dynamics of neuronal networks to treat neurological and psychiatric diseases.

One of the main topics at the Congress for Clinical Neuroscience of the German Society for Clinical Neurophysiology and Functional Neuroimaging (DGKN), recently held in Hamburg, Germany, was the dynamics of cerebral networks in sensorimotor and cognitive processes, as well as disruptions to network dynamics in neurological and psychiatric diseases.

“We will be unable to develop innovative therapies for widespread neurological and psychiatric diseases until we understand neuronal functions on every level of complexity,” Andreas K. Engel, PhD, director of the Institute for Neurophysiology and Pathophysiology at the University Hospital of Hamburg-Eppendorf, president of the DGKN, and congress president, said during an online press conference.
 

Characterizing states of consciousness

For more than 30 years, it has been known that neuronal signals in the brain are dynamically coupled. Despite intensive research, the functional significance of this coupling on information processing is still largely unknown.

Neuroimaging methods such as electroencephalography (EEG), magnetoencephalography (MEG), structural and functional magnetic resonance imaging (MRI), and electrophysiological examinations were used. Model calculations of the data suggest that dynamic couplings of signals in the cortex play a crucial role in memory performance, thinking processes, and developing perception, among other things.

It has already been shown that the network dynamics of neuronal signals could possibly characterize states of consciousness. Neuronal signals and coupling patterns differ significantly between healthy individuals in a waking state and those who are asleep, under general anesthetic, or in a vegetative state. In Dr. Engel’s view, it may be possible in the future for machine learning algorithms to be used to classify states of consciousness.
 

Changes in brain activity as a biomarker?

The differences in the dynamics of neuronal signals between healthy individuals and patients with psychiatric diseases such as schizophrenia appear much more important for clinical practice. “The characteristic changes in brain activity in the primary auditory cortex could be considered a potential biomarker and used to predict the clinical course of psychiatric diseases, such as psychoses,” reported Dr. Engel.

The gamma-band activity in the auditory cortex could be a potential marker for schizophrenia. According to MEG examinations, the values are decreased both in people at increased risk of psychosis and experiencing first symptoms compared with controls.
 

Activation or inhibition of cerebral networks as new therapeutic approaches

New therapeutic approaches based on the activation or inhibition of cerebral networks are currently areas of intensive research. Close interdisciplinary collaboration between basic science researchers and clinicians is necessary, stressed Dr. Engel. The use of noninvasive brain stimulation is already within reach for the neurorehabilitation of stroke patients. “I am optimistic that in a few years brain stimulation will be established as an integral element of stroke therapy,” said Christian Grefkes-Hermann, MD, PhD, director of the department of neurology at University Hospital of Frankfurt and first vice president of the DGKN.

Despite great advances in acute stroke therapy, many patients must endure permanent deficits in their everyday life, he said. According to Dr. Grefkes-Hermann, rehabilitation procedures often have a dissatisfactory effect, and results greatly vary. He hopes that in the future it may be possible to personalize therapy by using network patterns, thereby improving results.

The aim is to reorganize areas of the brain in which the network activity has been disrupted following a stroke using targeted transcranial magnetic stimulation (TMS). “The most important factor for functional recovery after a stroke is neuronal reorganization,” said Dr. Grefkes-Hermann. With the new methods of neurorehabilitation, network-connectivity disruptions, which are associated with motor function deficits, are first visualized using functional MRI (fMRI).

The imaging or the EEG makes visible the area of the brain that may benefit most from neurostimulation. Subsequently, nerve cells in this region may be precisely stimulated with TMS. Because the healthy hemisphere of the brain is usually overactive after a stroke, there are simultaneous attempts to inhibit the contralesional motor cortex.

Initial results are hopeful. In the initial period after a stroke, TMS can be used in some patients to correct pathological connectivities and thereby improve motor deficits, reported Dr. Grefkes-Hermann. The fMRI pattern can also be used to predict recovery and intervention effects on an individual basis. A phase 3 trial is currently underway of 150 patients who have had a stroke and aims to study the efficacy of the new procedure.
 

Combined TMS and EEG

With the combination of TMS and the simultaneous measurement of EEG activity, a further development of fMRI connectivity analyses is currently being tested. Dr. Grefkes-Hermann believes that this procedure, which is more cost-effective, has higher temporal resolution, can be used directly at the bedside, and has more potential for personalized therapy planning in clinical practice.

The TMS-EEG procedure also makes it possible to predict the risk of post-stroke delirium, which affects around 30% of stroke patients and greatly worsens the outcome, underlined Ulf Ziemann, MD, medical director of the department of neurology at Tübingen (Germany) University Hospital. In a study of 33 patients with acute stroke, the onset of post-stroke delirium could be predicted with a high degree of accuracy by using the TMS-EEG procedure no later than 48 hours after the event.

Other promising, noninvasive methods for neuron activation mentioned by Dr. Ziemann include transcranial focused ultrasound stimulation (tFUS) with low intensity, which is being studied for chronic pain, dementia, epilepsy, traumatic brain injury, and depression, as well as transcranial pulse stimulation (TPS), which is also based on ultrasound. In a pilot study of 35 patients with Alzheimer’s disease, use of TPS within 3 months had positive effects on cognition. However, the study was not controlled and therefore further assessments are needed.
 

Custom deep brain stimulation

For deep brain stimulation (DBS), an established therapy for Parkinson’s disease and other movement disorders, the aim is individualized, symptom-related network stimulation, reported Andrea Kühn, MD, head of the movement disorders and neuromodulation section in the department of neurology at Charité University Hospital Berlin.

At the panregional collaborative research center ReTune, which has been supported for 4 years now by €10 million from the German Research Foundation (DFG), imaging and computer-assisted programming algorithms are being developed for DBS. They will greatly simplify the time-consuming standard procedure for the best possible setting of the stimulation parameters, which requires a hospital stay of several days.

A randomized crossover study of 35 patients with Parkinson’s disease proved the equivalence of the fast, algorithm-assisted DBS for the control of motor symptoms compared with standard procedures.

The new methods have the potential to considerably improve the outcome of patients with neurological and psychiatric diseases, according to scientists. However, the positive data must still be validated in further studies.
 

This article was translated from Medscape’s German edition. A version of this article appeared on Medscape.com.

HAMBURG, GERMANY – Around 86 billion nerve cells in our brain work together in complex dynamic networks to control almost every sensorimotor and cognitive process. However, the way in which the information is processed in the different regions of the brain is still unclear. There are already some promising approaches to specifically influence the dynamics of neuronal networks to treat neurological and psychiatric diseases.

One of the main topics at the Congress for Clinical Neuroscience of the German Society for Clinical Neurophysiology and Functional Neuroimaging (DGKN), recently held in Hamburg, Germany, was the dynamics of cerebral networks in sensorimotor and cognitive processes, as well as disruptions to network dynamics in neurological and psychiatric diseases.

“We will be unable to develop innovative therapies for widespread neurological and psychiatric diseases until we understand neuronal functions on every level of complexity,” Andreas K. Engel, PhD, director of the Institute for Neurophysiology and Pathophysiology at the University Hospital of Hamburg-Eppendorf, president of the DGKN, and congress president, said during an online press conference.
 

Characterizing states of consciousness

For more than 30 years, it has been known that neuronal signals in the brain are dynamically coupled. Despite intensive research, the functional significance of this coupling on information processing is still largely unknown.

Neuroimaging methods such as electroencephalography (EEG), magnetoencephalography (MEG), structural and functional magnetic resonance imaging (MRI), and electrophysiological examinations were used. Model calculations of the data suggest that dynamic couplings of signals in the cortex play a crucial role in memory performance, thinking processes, and developing perception, among other things.

It has already been shown that the network dynamics of neuronal signals could possibly characterize states of consciousness. Neuronal signals and coupling patterns differ significantly between healthy individuals in a waking state and those who are asleep, under general anesthetic, or in a vegetative state. In Dr. Engel’s view, it may be possible in the future for machine learning algorithms to be used to classify states of consciousness.
 

Changes in brain activity as a biomarker?

The differences in the dynamics of neuronal signals between healthy individuals and patients with psychiatric diseases such as schizophrenia appear much more important for clinical practice. “The characteristic changes in brain activity in the primary auditory cortex could be considered a potential biomarker and used to predict the clinical course of psychiatric diseases, such as psychoses,” reported Dr. Engel.

The gamma-band activity in the auditory cortex could be a potential marker for schizophrenia. According to MEG examinations, the values are decreased both in people at increased risk of psychosis and experiencing first symptoms compared with controls.
 

Activation or inhibition of cerebral networks as new therapeutic approaches

New therapeutic approaches based on the activation or inhibition of cerebral networks are currently areas of intensive research. Close interdisciplinary collaboration between basic science researchers and clinicians is necessary, stressed Dr. Engel. The use of noninvasive brain stimulation is already within reach for the neurorehabilitation of stroke patients. “I am optimistic that in a few years brain stimulation will be established as an integral element of stroke therapy,” said Christian Grefkes-Hermann, MD, PhD, director of the department of neurology at University Hospital of Frankfurt and first vice president of the DGKN.

Despite great advances in acute stroke therapy, many patients must endure permanent deficits in their everyday life, he said. According to Dr. Grefkes-Hermann, rehabilitation procedures often have a dissatisfactory effect, and results greatly vary. He hopes that in the future it may be possible to personalize therapy by using network patterns, thereby improving results.

The aim is to reorganize areas of the brain in which the network activity has been disrupted following a stroke using targeted transcranial magnetic stimulation (TMS). “The most important factor for functional recovery after a stroke is neuronal reorganization,” said Dr. Grefkes-Hermann. With the new methods of neurorehabilitation, network-connectivity disruptions, which are associated with motor function deficits, are first visualized using functional MRI (fMRI).

The imaging or the EEG makes visible the area of the brain that may benefit most from neurostimulation. Subsequently, nerve cells in this region may be precisely stimulated with TMS. Because the healthy hemisphere of the brain is usually overactive after a stroke, there are simultaneous attempts to inhibit the contralesional motor cortex.

Initial results are hopeful. In the initial period after a stroke, TMS can be used in some patients to correct pathological connectivities and thereby improve motor deficits, reported Dr. Grefkes-Hermann. The fMRI pattern can also be used to predict recovery and intervention effects on an individual basis. A phase 3 trial is currently underway of 150 patients who have had a stroke and aims to study the efficacy of the new procedure.
 

Combined TMS and EEG

With the combination of TMS and the simultaneous measurement of EEG activity, a further development of fMRI connectivity analyses is currently being tested. Dr. Grefkes-Hermann believes that this procedure, which is more cost-effective, has higher temporal resolution, can be used directly at the bedside, and has more potential for personalized therapy planning in clinical practice.

The TMS-EEG procedure also makes it possible to predict the risk of post-stroke delirium, which affects around 30% of stroke patients and greatly worsens the outcome, underlined Ulf Ziemann, MD, medical director of the department of neurology at Tübingen (Germany) University Hospital. In a study of 33 patients with acute stroke, the onset of post-stroke delirium could be predicted with a high degree of accuracy by using the TMS-EEG procedure no later than 48 hours after the event.

Other promising, noninvasive methods for neuron activation mentioned by Dr. Ziemann include transcranial focused ultrasound stimulation (tFUS) with low intensity, which is being studied for chronic pain, dementia, epilepsy, traumatic brain injury, and depression, as well as transcranial pulse stimulation (TPS), which is also based on ultrasound. In a pilot study of 35 patients with Alzheimer’s disease, use of TPS within 3 months had positive effects on cognition. However, the study was not controlled and therefore further assessments are needed.
 

Custom deep brain stimulation

For deep brain stimulation (DBS), an established therapy for Parkinson’s disease and other movement disorders, the aim is individualized, symptom-related network stimulation, reported Andrea Kühn, MD, head of the movement disorders and neuromodulation section in the department of neurology at Charité University Hospital Berlin.

At the panregional collaborative research center ReTune, which has been supported for 4 years now by €10 million from the German Research Foundation (DFG), imaging and computer-assisted programming algorithms are being developed for DBS. They will greatly simplify the time-consuming standard procedure for the best possible setting of the stimulation parameters, which requires a hospital stay of several days.

A randomized crossover study of 35 patients with Parkinson’s disease proved the equivalence of the fast, algorithm-assisted DBS for the control of motor symptoms compared with standard procedures.

The new methods have the potential to considerably improve the outcome of patients with neurological and psychiatric diseases, according to scientists. However, the positive data must still be validated in further studies.
 

This article was translated from Medscape’s German edition. A version of this article appeared on Medscape.com.

HAMBURG, GERMANY – Around 86 billion nerve cells in our brain work together in complex dynamic networks to control almost every sensorimotor and cognitive process. However, the way in which the information is processed in the different regions of the brain is still unclear. There are already some promising approaches to specifically influence the dynamics of neuronal networks to treat neurological and psychiatric diseases.

One of the main topics at the Congress for Clinical Neuroscience of the German Society for Clinical Neurophysiology and Functional Neuroimaging (DGKN), recently held in Hamburg, Germany, was the dynamics of cerebral networks in sensorimotor and cognitive processes, as well as disruptions to network dynamics in neurological and psychiatric diseases.

“We will be unable to develop innovative therapies for widespread neurological and psychiatric diseases until we understand neuronal functions on every level of complexity,” Andreas K. Engel, PhD, director of the Institute for Neurophysiology and Pathophysiology at the University Hospital of Hamburg-Eppendorf, president of the DGKN, and congress president, said during an online press conference.
 

Characterizing states of consciousness

For more than 30 years, it has been known that neuronal signals in the brain are dynamically coupled. Despite intensive research, the functional significance of this coupling on information processing is still largely unknown.

Neuroimaging methods such as electroencephalography (EEG), magnetoencephalography (MEG), structural and functional magnetic resonance imaging (MRI), and electrophysiological examinations were used. Model calculations of the data suggest that dynamic couplings of signals in the cortex play a crucial role in memory performance, thinking processes, and developing perception, among other things.

It has already been shown that the network dynamics of neuronal signals could possibly characterize states of consciousness. Neuronal signals and coupling patterns differ significantly between healthy individuals in a waking state and those who are asleep, under general anesthetic, or in a vegetative state. In Dr. Engel’s view, it may be possible in the future for machine learning algorithms to be used to classify states of consciousness.
 

Changes in brain activity as a biomarker?

The differences in the dynamics of neuronal signals between healthy individuals and patients with psychiatric diseases such as schizophrenia appear much more important for clinical practice. “The characteristic changes in brain activity in the primary auditory cortex could be considered a potential biomarker and used to predict the clinical course of psychiatric diseases, such as psychoses,” reported Dr. Engel.

The gamma-band activity in the auditory cortex could be a potential marker for schizophrenia. According to MEG examinations, the values are decreased both in people at increased risk of psychosis and experiencing first symptoms compared with controls.
 

Activation or inhibition of cerebral networks as new therapeutic approaches

New therapeutic approaches based on the activation or inhibition of cerebral networks are currently areas of intensive research. Close interdisciplinary collaboration between basic science researchers and clinicians is necessary, stressed Dr. Engel. The use of noninvasive brain stimulation is already within reach for the neurorehabilitation of stroke patients. “I am optimistic that in a few years brain stimulation will be established as an integral element of stroke therapy,” said Christian Grefkes-Hermann, MD, PhD, director of the department of neurology at University Hospital of Frankfurt and first vice president of the DGKN.

Despite great advances in acute stroke therapy, many patients must endure permanent deficits in their everyday life, he said. According to Dr. Grefkes-Hermann, rehabilitation procedures often have a dissatisfactory effect, and results greatly vary. He hopes that in the future it may be possible to personalize therapy by using network patterns, thereby improving results.

The aim is to reorganize areas of the brain in which the network activity has been disrupted following a stroke using targeted transcranial magnetic stimulation (TMS). “The most important factor for functional recovery after a stroke is neuronal reorganization,” said Dr. Grefkes-Hermann. With the new methods of neurorehabilitation, network-connectivity disruptions, which are associated with motor function deficits, are first visualized using functional MRI (fMRI).

The imaging or the EEG makes visible the area of the brain that may benefit most from neurostimulation. Subsequently, nerve cells in this region may be precisely stimulated with TMS. Because the healthy hemisphere of the brain is usually overactive after a stroke, there are simultaneous attempts to inhibit the contralesional motor cortex.

Initial results are hopeful. In the initial period after a stroke, TMS can be used in some patients to correct pathological connectivities and thereby improve motor deficits, reported Dr. Grefkes-Hermann. The fMRI pattern can also be used to predict recovery and intervention effects on an individual basis. A phase 3 trial is currently underway of 150 patients who have had a stroke and aims to study the efficacy of the new procedure.
 

Combined TMS and EEG

With the combination of TMS and the simultaneous measurement of EEG activity, a further development of fMRI connectivity analyses is currently being tested. Dr. Grefkes-Hermann believes that this procedure, which is more cost-effective, has higher temporal resolution, can be used directly at the bedside, and has more potential for personalized therapy planning in clinical practice.

The TMS-EEG procedure also makes it possible to predict the risk of post-stroke delirium, which affects around 30% of stroke patients and greatly worsens the outcome, underlined Ulf Ziemann, MD, medical director of the department of neurology at Tübingen (Germany) University Hospital. In a study of 33 patients with acute stroke, the onset of post-stroke delirium could be predicted with a high degree of accuracy by using the TMS-EEG procedure no later than 48 hours after the event.

Other promising, noninvasive methods for neuron activation mentioned by Dr. Ziemann include transcranial focused ultrasound stimulation (tFUS) with low intensity, which is being studied for chronic pain, dementia, epilepsy, traumatic brain injury, and depression, as well as transcranial pulse stimulation (TPS), which is also based on ultrasound. In a pilot study of 35 patients with Alzheimer’s disease, use of TPS within 3 months had positive effects on cognition. However, the study was not controlled and therefore further assessments are needed.
 

Custom deep brain stimulation

For deep brain stimulation (DBS), an established therapy for Parkinson’s disease and other movement disorders, the aim is individualized, symptom-related network stimulation, reported Andrea Kühn, MD, head of the movement disorders and neuromodulation section in the department of neurology at Charité University Hospital Berlin.

At the panregional collaborative research center ReTune, which has been supported for 4 years now by €10 million from the German Research Foundation (DFG), imaging and computer-assisted programming algorithms are being developed for DBS. They will greatly simplify the time-consuming standard procedure for the best possible setting of the stimulation parameters, which requires a hospital stay of several days.

A randomized crossover study of 35 patients with Parkinson’s disease proved the equivalence of the fast, algorithm-assisted DBS for the control of motor symptoms compared with standard procedures.

The new methods have the potential to considerably improve the outcome of patients with neurological and psychiatric diseases, according to scientists. However, the positive data must still be validated in further studies.
 

This article was translated from Medscape’s German edition. A version of this article appeared on Medscape.com.

Ascend Laboratories is recalling 10 lots of the oral anticoagulant dabigatran etexilate capsules (75 mg and 150 mg) because of unacceptable levels of a potential carcinogen.

The nationwide recall, to the consumer level, is because of the detection of the nitrosamine impurity, N-nitroso-dabigatran, which may increase the risk of cancer with prolonged exposure to levels higher than acceptable.

To date, Ascend Laboratories has not received any reports of adverse events related to this recall.

The recalled product was distributed nationwide to wholesalers, distributors, and retailers in the United States from June 2022 to October 2022.

Complete details of the recalled product, including national drug code, lot numbers, expiration dates, and configuration/counts, are provided in a company announcement that was posted on the Food and Drug Administration website.

The company is advising patients who have any dabigatran that has been recalled to continue taking their medication and to contact their physician for advice regarding an alternative treatment.

Wholesalers/distributors and pharmacies with an existing inventory of the affected lots should stop use and distribution and quarantine the product immediately. Wholesalers and distributors should also recall the distributed product.

Questions regarding this recall can call Ascend Laboratories at 877.272.7901 (24 hours, 7 days a week).

Problems with this product should be reported to the FDA through MedWatch, its adverse event reporting program.

A version of this article originally appeared on Medscape.com.

Ascend Laboratories is recalling 10 lots of the oral anticoagulant dabigatran etexilate capsules (75 mg and 150 mg) because of unacceptable levels of a potential carcinogen.

The nationwide recall, to the consumer level, is because of the detection of the nitrosamine impurity, N-nitroso-dabigatran, which may increase the risk of cancer with prolonged exposure to levels higher than acceptable.

To date, Ascend Laboratories has not received any reports of adverse events related to this recall.

The recalled product was distributed nationwide to wholesalers, distributors, and retailers in the United States from June 2022 to October 2022.

Complete details of the recalled product, including national drug code, lot numbers, expiration dates, and configuration/counts, are provided in a company announcement that was posted on the Food and Drug Administration website.

The company is advising patients who have any dabigatran that has been recalled to continue taking their medication and to contact their physician for advice regarding an alternative treatment.

Wholesalers/distributors and pharmacies with an existing inventory of the affected lots should stop use and distribution and quarantine the product immediately. Wholesalers and distributors should also recall the distributed product.

Questions regarding this recall can call Ascend Laboratories at 877.272.7901 (24 hours, 7 days a week).

Problems with this product should be reported to the FDA through MedWatch, its adverse event reporting program.

A version of this article originally appeared on Medscape.com.

Ascend Laboratories is recalling 10 lots of the oral anticoagulant dabigatran etexilate capsules (75 mg and 150 mg) because of unacceptable levels of a potential carcinogen.

The nationwide recall, to the consumer level, is because of the detection of the nitrosamine impurity, N-nitroso-dabigatran, which may increase the risk of cancer with prolonged exposure to levels higher than acceptable.

To date, Ascend Laboratories has not received any reports of adverse events related to this recall.

The recalled product was distributed nationwide to wholesalers, distributors, and retailers in the United States from June 2022 to October 2022.

Complete details of the recalled product, including national drug code, lot numbers, expiration dates, and configuration/counts, are provided in a company announcement that was posted on the Food and Drug Administration website.

The company is advising patients who have any dabigatran that has been recalled to continue taking their medication and to contact their physician for advice regarding an alternative treatment.

Wholesalers/distributors and pharmacies with an existing inventory of the affected lots should stop use and distribution and quarantine the product immediately. Wholesalers and distributors should also recall the distributed product.

Questions regarding this recall can call Ascend Laboratories at 877.272.7901 (24 hours, 7 days a week).

Problems with this product should be reported to the FDA through MedWatch, its adverse event reporting program.

A version of this article originally appeared on Medscape.com.

WASHINGTON – Left atrial appendage closure can be performed safely and effectively in older patients, those with end-stage renal disease, and likely others not included in the pivotal clinical trials, according to a series of new studies, including a late-breaker, presented on the both older and newer Watchman devices at the Cardiovascular Research Technologies conference.

In the case of the late-breaking clinical trial report, which included more than 60,000 patients, the goal was to look at the safety of the Watchman FLX, which is the newest of the devices in real-world practice, according to Samir R. Kapadia, MD, chairman of the department of cardiovascular medicine at the Cleveland Clinic.

Ted Bosworth/MDedge News

In the SURPASS registry, the number of patients discharged on the Watchman FLX climbed from zero in August 2020, when data accrual began, to 66,894 by March 2022. For the current analysis, 45-day follow-up was available for 61,963 patients and 1-year follow-up was available for 18,233.

Based on this number of patients treated by more than 2,300 clinicians at more than 740 sites, the SURPASS registry establishes that Watchman FLX “can be accomplished safely with clinical outcomes similar to pivotal trials at 45 days and 1 year,” Dr. Kapadia reported.
 

No surprises found in real-world outcome

At 7 days or hospital discharge (whichever came last), the rate of all-cause death was 0.18%, the rate of ischemic stroke was 0.13%, and there were no systemic emboli. By 45 days, the rate of all-cause death (0.84%) and stroke of any kind (0.32%) remained less than 1% and there were still no systemic emboli. Major bleeding events, of which about one-third occurred during hospitalization, had reached 3.34% by day 45.

By 1 year, all-cause mortality had risen to 8.3%, the stroke rate was 1.6%, and major bleeding reached 6.7%. The rate of systemic emboli remained very low (0.1%). The rates of death and stroke rose at a slow but steady rate throughout the 1-year follow-up. In contrast, major bleeding events rose steeply in the first 90 days and were followed by a much slower accrual subsequently.

At 1 year, 84.4% of patients had a complete seal. Leaks ≤ 3 mm were observed in 12.1%. The remaining leaks were larger, but just 0.7% had a leak > 5 mm.

Relative to the first-generation Watchman, the Watchman FLX has numerous design changes, including a shorter profile, more struts, and a reduced metal exposure. Most of these changes were performed to make the device easier to deploy.

When the SURPASS data are compared to the pivotal trials with Watchman FLX or to the Ewolution and National Cardiovascular Data (NCD) registries, which were created to monitor efficacy and safety with the earlier generation Watchman, the outcomes are similar or, in many cases, numerically favorable for such outcomes as bleeding and rates of stroke.

In addition to providing reassurance for the real-world safety of Watchman FLX, Dr. Kapadia said that these data establish reasonable benchmarks for centers tracking in-hospital and 1-year outcomes.

Dr. Kapadia also reported that outcomes overall in SURPASS were similar in women and men with the exception of major bleeding, a finding common to other interventional studies.

The late-breaker panelists generally agreed that SURPASS provides a robust set of data by which to be reassured, but David J. Cohen, MD, director of Clinical and Outcomes Research at the Cardiovascular Research Foundation in New York, said that he thinks the rate of bleeding is unnecessarily high.

“You really need to figure out a way to get the rate of bleeding at 45 days down,” Dr. Cohen said. He called for studies of anticoagulation in the post-procedural period that offer a better benefit-to-risk ratio.
 

Elderly patients benefit equally from Watchman

Yet, Watchman devices are generally regarded as a success story, and this has led investigators to evaluate safety in patients not well represented or explicitly excluded from clinical trials, such as the elderly and those with end-stage renal disease (ESRD). New data derived from experience in both of these groups were presented at the conference, which was sponsored by MedStar Heart & Vascular Institute.

To tease out the relative safety of Watchman in octogenarians, Samian Sulaiman, MD, a cardiology fellow at West Virginia University Heart and Vascular Institute, Morgantown, performed a competing risk analysis to study the relative benefit of Watchman devices after controlling for the greater overall risk of complications in the elderly.

In raw data comparisons of those 80 years of age or older to those younger in published trials, the not-surprising result is that overall rates of death and ischemic events are far higher in the elderly, according to Dr. Sulaiman, but it’s an “unfair comparison,” he said.

“It is easy to mistakenly conclude that left atrial appendage closure is associated with worse outcomes, but older patients have far higher rates of these events independent of other factors,” Dr. Sulaiman noted.

In fact, in his comparison of 472 older patients to 1,404 younger patients, the seal rates at 45 days, 6 months, and 12 months are almost identical. Moreover, after the extensive adjustments performed for competing risk analysis, the rates of death, stroke, and bleeding were also almost identical for those 80 years or older whether or not they received a Watchman.

Although he acknowledged the risk for residual confounding, Dr. Sulaiman concluded that elderly patients derive about the same benefits as younger patients from the Watchman. He concluded age alone should not be a factor in selecting candidates for this device.
 

ESRD is not Watchman contraindication

A similar point was made about ESRD based on analysis of 237 patients who received either an earlier generation Watchman or the Watchman FLX. Initiated in Spain, the study was amended to collect data from centers elsewhere in Europe, the United States, and Australia.

Successful implantation was achieved in 99.2% of the patients, reported Armando Perez de Prado, MD, PhD, head of interventional cardiology at the University of Leon, Spain.

Ted Bosworth/MDedge News

WASHINGTON – Left atrial appendage closure can be performed safely and effectively in older patients, those with end-stage renal disease, and likely others not included in the pivotal clinical trials, according to a series of new studies, including a late-breaker, presented on the both older and newer Watchman devices at the Cardiovascular Research Technologies conference.

In the case of the late-breaking clinical trial report, which included more than 60,000 patients, the goal was to look at the safety of the Watchman FLX, which is the newest of the devices in real-world practice, according to Samir R. Kapadia, MD, chairman of the department of cardiovascular medicine at the Cleveland Clinic.

Ted Bosworth/MDedge News

In the SURPASS registry, the number of patients discharged on the Watchman FLX climbed from zero in August 2020, when data accrual began, to 66,894 by March 2022. For the current analysis, 45-day follow-up was available for 61,963 patients and 1-year follow-up was available for 18,233.

Based on this number of patients treated by more than 2,300 clinicians at more than 740 sites, the SURPASS registry establishes that Watchman FLX “can be accomplished safely with clinical outcomes similar to pivotal trials at 45 days and 1 year,” Dr. Kapadia reported.
 

No surprises found in real-world outcome

At 7 days or hospital discharge (whichever came last), the rate of all-cause death was 0.18%, the rate of ischemic stroke was 0.13%, and there were no systemic emboli. By 45 days, the rate of all-cause death (0.84%) and stroke of any kind (0.32%) remained less than 1% and there were still no systemic emboli. Major bleeding events, of which about one-third occurred during hospitalization, had reached 3.34% by day 45.

By 1 year, all-cause mortality had risen to 8.3%, the stroke rate was 1.6%, and major bleeding reached 6.7%. The rate of systemic emboli remained very low (0.1%). The rates of death and stroke rose at a slow but steady rate throughout the 1-year follow-up. In contrast, major bleeding events rose steeply in the first 90 days and were followed by a much slower accrual subsequently.

At 1 year, 84.4% of patients had a complete seal. Leaks ≤ 3 mm were observed in 12.1%. The remaining leaks were larger, but just 0.7% had a leak > 5 mm.

Relative to the first-generation Watchman, the Watchman FLX has numerous design changes, including a shorter profile, more struts, and a reduced metal exposure. Most of these changes were performed to make the device easier to deploy.

When the SURPASS data are compared to the pivotal trials with Watchman FLX or to the Ewolution and National Cardiovascular Data (NCD) registries, which were created to monitor efficacy and safety with the earlier generation Watchman, the outcomes are similar or, in many cases, numerically favorable for such outcomes as bleeding and rates of stroke.

In addition to providing reassurance for the real-world safety of Watchman FLX, Dr. Kapadia said that these data establish reasonable benchmarks for centers tracking in-hospital and 1-year outcomes.

Dr. Kapadia also reported that outcomes overall in SURPASS were similar in women and men with the exception of major bleeding, a finding common to other interventional studies.

The late-breaker panelists generally agreed that SURPASS provides a robust set of data by which to be reassured, but David J. Cohen, MD, director of Clinical and Outcomes Research at the Cardiovascular Research Foundation in New York, said that he thinks the rate of bleeding is unnecessarily high.

“You really need to figure out a way to get the rate of bleeding at 45 days down,” Dr. Cohen said. He called for studies of anticoagulation in the post-procedural period that offer a better benefit-to-risk ratio.
 

Elderly patients benefit equally from Watchman

Yet, Watchman devices are generally regarded as a success story, and this has led investigators to evaluate safety in patients not well represented or explicitly excluded from clinical trials, such as the elderly and those with end-stage renal disease (ESRD). New data derived from experience in both of these groups were presented at the conference, which was sponsored by MedStar Heart & Vascular Institute.

To tease out the relative safety of Watchman in octogenarians, Samian Sulaiman, MD, a cardiology fellow at West Virginia University Heart and Vascular Institute, Morgantown, performed a competing risk analysis to study the relative benefit of Watchman devices after controlling for the greater overall risk of complications in the elderly.

In raw data comparisons of those 80 years of age or older to those younger in published trials, the not-surprising result is that overall rates of death and ischemic events are far higher in the elderly, according to Dr. Sulaiman, but it’s an “unfair comparison,” he said.

“It is easy to mistakenly conclude that left atrial appendage closure is associated with worse outcomes, but older patients have far higher rates of these events independent of other factors,” Dr. Sulaiman noted.

In fact, in his comparison of 472 older patients to 1,404 younger patients, the seal rates at 45 days, 6 months, and 12 months are almost identical. Moreover, after the extensive adjustments performed for competing risk analysis, the rates of death, stroke, and bleeding were also almost identical for those 80 years or older whether or not they received a Watchman.

Although he acknowledged the risk for residual confounding, Dr. Sulaiman concluded that elderly patients derive about the same benefits as younger patients from the Watchman. He concluded age alone should not be a factor in selecting candidates for this device.
 

ESRD is not Watchman contraindication

A similar point was made about ESRD based on analysis of 237 patients who received either an earlier generation Watchman or the Watchman FLX. Initiated in Spain, the study was amended to collect data from centers elsewhere in Europe, the United States, and Australia.

Successful implantation was achieved in 99.2% of the patients, reported Armando Perez de Prado, MD, PhD, head of interventional cardiology at the University of Leon, Spain.

Ted Bosworth/MDedge News

WASHINGTON – Left atrial appendage closure can be performed safely and effectively in older patients, those with end-stage renal disease, and likely others not included in the pivotal clinical trials, according to a series of new studies, including a late-breaker, presented on the both older and newer Watchman devices at the Cardiovascular Research Technologies conference.

In the case of the late-breaking clinical trial report, which included more than 60,000 patients, the goal was to look at the safety of the Watchman FLX, which is the newest of the devices in real-world practice, according to Samir R. Kapadia, MD, chairman of the department of cardiovascular medicine at the Cleveland Clinic.

Ted Bosworth/MDedge News

In the SURPASS registry, the number of patients discharged on the Watchman FLX climbed from zero in August 2020, when data accrual began, to 66,894 by March 2022. For the current analysis, 45-day follow-up was available for 61,963 patients and 1-year follow-up was available for 18,233.

Based on this number of patients treated by more than 2,300 clinicians at more than 740 sites, the SURPASS registry establishes that Watchman FLX “can be accomplished safely with clinical outcomes similar to pivotal trials at 45 days and 1 year,” Dr. Kapadia reported.
 

No surprises found in real-world outcome

At 7 days or hospital discharge (whichever came last), the rate of all-cause death was 0.18%, the rate of ischemic stroke was 0.13%, and there were no systemic emboli. By 45 days, the rate of all-cause death (0.84%) and stroke of any kind (0.32%) remained less than 1% and there were still no systemic emboli. Major bleeding events, of which about one-third occurred during hospitalization, had reached 3.34% by day 45.

By 1 year, all-cause mortality had risen to 8.3%, the stroke rate was 1.6%, and major bleeding reached 6.7%. The rate of systemic emboli remained very low (0.1%). The rates of death and stroke rose at a slow but steady rate throughout the 1-year follow-up. In contrast, major bleeding events rose steeply in the first 90 days and were followed by a much slower accrual subsequently.

At 1 year, 84.4% of patients had a complete seal. Leaks ≤ 3 mm were observed in 12.1%. The remaining leaks were larger, but just 0.7% had a leak > 5 mm.

Relative to the first-generation Watchman, the Watchman FLX has numerous design changes, including a shorter profile, more struts, and a reduced metal exposure. Most of these changes were performed to make the device easier to deploy.

When the SURPASS data are compared to the pivotal trials with Watchman FLX or to the Ewolution and National Cardiovascular Data (NCD) registries, which were created to monitor efficacy and safety with the earlier generation Watchman, the outcomes are similar or, in many cases, numerically favorable for such outcomes as bleeding and rates of stroke.

In addition to providing reassurance for the real-world safety of Watchman FLX, Dr. Kapadia said that these data establish reasonable benchmarks for centers tracking in-hospital and 1-year outcomes.

Dr. Kapadia also reported that outcomes overall in SURPASS were similar in women and men with the exception of major bleeding, a finding common to other interventional studies.

The late-breaker panelists generally agreed that SURPASS provides a robust set of data by which to be reassured, but David J. Cohen, MD, director of Clinical and Outcomes Research at the Cardiovascular Research Foundation in New York, said that he thinks the rate of bleeding is unnecessarily high.

“You really need to figure out a way to get the rate of bleeding at 45 days down,” Dr. Cohen said. He called for studies of anticoagulation in the post-procedural period that offer a better benefit-to-risk ratio.
 

Elderly patients benefit equally from Watchman

Yet, Watchman devices are generally regarded as a success story, and this has led investigators to evaluate safety in patients not well represented or explicitly excluded from clinical trials, such as the elderly and those with end-stage renal disease (ESRD). New data derived from experience in both of these groups were presented at the conference, which was sponsored by MedStar Heart & Vascular Institute.

To tease out the relative safety of Watchman in octogenarians, Samian Sulaiman, MD, a cardiology fellow at West Virginia University Heart and Vascular Institute, Morgantown, performed a competing risk analysis to study the relative benefit of Watchman devices after controlling for the greater overall risk of complications in the elderly.

In raw data comparisons of those 80 years of age or older to those younger in published trials, the not-surprising result is that overall rates of death and ischemic events are far higher in the elderly, according to Dr. Sulaiman, but it’s an “unfair comparison,” he said.

“It is easy to mistakenly conclude that left atrial appendage closure is associated with worse outcomes, but older patients have far higher rates of these events independent of other factors,” Dr. Sulaiman noted.

In fact, in his comparison of 472 older patients to 1,404 younger patients, the seal rates at 45 days, 6 months, and 12 months are almost identical. Moreover, after the extensive adjustments performed for competing risk analysis, the rates of death, stroke, and bleeding were also almost identical for those 80 years or older whether or not they received a Watchman.

Although he acknowledged the risk for residual confounding, Dr. Sulaiman concluded that elderly patients derive about the same benefits as younger patients from the Watchman. He concluded age alone should not be a factor in selecting candidates for this device.
 

ESRD is not Watchman contraindication

A similar point was made about ESRD based on analysis of 237 patients who received either an earlier generation Watchman or the Watchman FLX. Initiated in Spain, the study was amended to collect data from centers elsewhere in Europe, the United States, and Australia.

Successful implantation was achieved in 99.2% of the patients, reported Armando Perez de Prado, MD, PhD, head of interventional cardiology at the University of Leon, Spain.

Ted Bosworth/MDedge News

NEW ORLEANS – In the international FREEDOM COVID trial that randomized non–critically ill hospitalized patients, a therapeutic dose of anticoagulation relative to a prophylactic dose significantly reduced death from COVID-19 at 30 days, even as a larger composite primary endpoint was missed.

The mortality reduction suggests therapeutic-dose anticoagulation “may improve outcomes in non–critically ill patients hospitalized with COVID-19 who are at increased risk for adverse events but do not yet require ICU-level of care,” reported Valentin Fuster, MD, PhD, at the joint scientific sessions of the American College of Cardiology and the World Heart Federation.

Ted Bosworth/MDedge News

These data provide a suggestion rather than a demonstration of benefit because the primary composite endpoint of all-cause mortality, intubation requiring mechanical ventilation, systemic thromboembolism or ischemic stroke at 30 days was not met. Although this 30-day outcome was lower on the therapeutic dose (11.3% vs. 13.2%), the difference was only a trend (hazard ratio, 0.85; P = .11), said Dr. Fuster, physician-in-chief, Mount Sinai Hospital, New York.
 

Missed primary endpoint blamed on low events

The declining severity of more recent COVID-19 variants (the trial was conducted from August 2022 to September 2022) might be one explanation that the primary endpoint was not met, but the more likely explanation is the relatively good health status – and therefore a low risk of events – among patients randomized in India, 1 of 10 participating countries.

India accounted for roughly 40% of the total number of 3,398 patients in the intention-to-treat population. In India, the rates of events were 0.7 and 1.3 in the prophylactic and therapeutic anticoagulation arms, respectively. In contrast, they were 17.5 and 9.5, respectively in the United States. In combined data from the other eight countries, the rates were 22.78 and 20.4, respectively.

“These results emphasize that varying country-specific thresholds for hospitalization may affect patient prognosis and the potential utility of advanced therapies” Dr. Fuster said.

In fact, the therapeutic anticoagulation was linked to a nonsignificant twofold increase in the risk of the primary outcome in India (HR, 2.01; 95% confidence interval, 0.57-7.13) when outcomes were stratified by country. In the United States, where there was a much higher incidence of events, therapeutic anticoagulation was associated with a nearly 50% reduction (HR, 0.53; 95% CI, 0.31-0.91).

In the remaining countries, which included those in Latin America and Europe as well as the city of Hong Kong, the primary outcome was reduced numerically but not statistically by therapeutic relative to prophylactic anticoagulation (HR, 0.89; 95% CI, 0.71-1.11).
 

Enoxaparin and apixaban are studied

In FREEDOM COVID, patients were randomized to a therapeutic dose of the low-molecular-weight heparin (LMWH) enoxaparin (1 mg/kg every 12 hours), a prophylactic dose of enoxaparin (40 mg once daily), or a therapeutic dose of the direct factor Xa inhibitor apixaban (5 mg every 12 hours). Lower doses of enoxaparin and apixaban were used for those with renal impairment, and lower doses of apixaban were employed for elderly patients (≥ 80 years) and those with low body weight (≤ 60 kg).

The major inclusion criteria were confirmed COVID-19 infection with symptomatic systemic involvement. The major exclusion criteria were need for ICU level of care or active bleeding.

The therapeutic anticoagulation arms performed similarly and were combined for comparison to the prophylactic arm. Despite the failure to show a difference in the primary outcome, the rate of 30-day mortality was substantially lower in the therapeutic arm (4.9% vs. 7.0%), translating into a 30% risk reduction (HR, 0.70; P = .01).

Therapeutic anticoagulation was also associated with a lower rate of intubation/mechanical ventilation (6.4% vs. 8.4%) that reached statistical significance (HR, 0.75; P = .03). The risk reduction was also significant for a combination of these endpoints (HR, 0.77; P = .03).

The lower proportion of patients who eventually required ICU-level of care (9.9% vs. 11.7%) showed a trend in favor of therapeutic anticoagulation (HR, 0.84; P = .11).
 

Bleeding rates did not differ between arms

Bleeding Academic Research Consortium major bleeding types 3 and 5 were slightly numerically higher in the group randomized to therapeutic enoxaparin (0.5%) than prophylactic enoxaparin (0.1%) and therapeutic apixaban (0.3%), but the differences between any groups were not significant.

Numerous anticoagulation trials in patients with COVID-19 have been published previously. One 2021 trial published in the New England Journal of Medicine also suggested benefit from a therapeutic relative to prophylactic anticoagulation. In that trial, which compared heparin to usual-care thromboprophylaxis, benefits were derived from a Bayesian analysis. Significant differences were not shown for death or other major outcome assessed individually.

Even though this more recent trial missed its primary endpoint, Gregg Stone, MD, a coauthor of this study and a colleague of Dr. Fuster at the Mount Sinai School of Medicine, New York, reiterated that these results support routine anticoagulation in hospitalized COVID-19 patients.

“These are robust reductions in mortality and intubation rates, which are the most serious outcomes,” said Dr. Stone, who is first author of the paper, which was published in the Journal of the American College of Cardiology immediately after Dr. Fuster’s presentation.

COVID-19 has proven to be a very thrombogenic virus, but the literature has not been wholly consistent on which anticoagulation treatment provides the best balance of benefits and risks, according to Julia Grapsa, MD, PhD, attending cardiologist, Guys and St. Thomas Hospital, London. She said that this randomized trial, despite its failure to meet the primary endpoint, is useful.

“This demonstrates that a therapeutic dose of enoxaparin is likely to improve outcomes over a prophylactic dose with a low risk of bleeding,” Dr. Grapsa said. On the basis of the randomized study, “I feel more confident with this approach.”

Dr. Fuster reported no potential conflicts of interest. Dr. Stone has financial relationships with more than 30 companies that make pharmaceuticals and medical devices. Dr. Grapsa reported no potential conflicts of interest.

NEW ORLEANS – In the international FREEDOM COVID trial that randomized non–critically ill hospitalized patients, a therapeutic dose of anticoagulation relative to a prophylactic dose significantly reduced death from COVID-19 at 30 days, even as a larger composite primary endpoint was missed.

The mortality reduction suggests therapeutic-dose anticoagulation “may improve outcomes in non–critically ill patients hospitalized with COVID-19 who are at increased risk for adverse events but do not yet require ICU-level of care,” reported Valentin Fuster, MD, PhD, at the joint scientific sessions of the American College of Cardiology and the World Heart Federation.

Ted Bosworth/MDedge News

These data provide a suggestion rather than a demonstration of benefit because the primary composite endpoint of all-cause mortality, intubation requiring mechanical ventilation, systemic thromboembolism or ischemic stroke at 30 days was not met. Although this 30-day outcome was lower on the therapeutic dose (11.3% vs. 13.2%), the difference was only a trend (hazard ratio, 0.85; P = .11), said Dr. Fuster, physician-in-chief, Mount Sinai Hospital, New York.
 

Missed primary endpoint blamed on low events

The declining severity of more recent COVID-19 variants (the trial was conducted from August 2022 to September 2022) might be one explanation that the primary endpoint was not met, but the more likely explanation is the relatively good health status – and therefore a low risk of events – among patients randomized in India, 1 of 10 participating countries.

India accounted for roughly 40% of the total number of 3,398 patients in the intention-to-treat population. In India, the rates of events were 0.7 and 1.3 in the prophylactic and therapeutic anticoagulation arms, respectively. In contrast, they were 17.5 and 9.5, respectively in the United States. In combined data from the other eight countries, the rates were 22.78 and 20.4, respectively.

“These results emphasize that varying country-specific thresholds for hospitalization may affect patient prognosis and the potential utility of advanced therapies” Dr. Fuster said.

In fact, the therapeutic anticoagulation was linked to a nonsignificant twofold increase in the risk of the primary outcome in India (HR, 2.01; 95% confidence interval, 0.57-7.13) when outcomes were stratified by country. In the United States, where there was a much higher incidence of events, therapeutic anticoagulation was associated with a nearly 50% reduction (HR, 0.53; 95% CI, 0.31-0.91).

In the remaining countries, which included those in Latin America and Europe as well as the city of Hong Kong, the primary outcome was reduced numerically but not statistically by therapeutic relative to prophylactic anticoagulation (HR, 0.89; 95% CI, 0.71-1.11).
 

Enoxaparin and apixaban are studied

In FREEDOM COVID, patients were randomized to a therapeutic dose of the low-molecular-weight heparin (LMWH) enoxaparin (1 mg/kg every 12 hours), a prophylactic dose of enoxaparin (40 mg once daily), or a therapeutic dose of the direct factor Xa inhibitor apixaban (5 mg every 12 hours). Lower doses of enoxaparin and apixaban were used for those with renal impairment, and lower doses of apixaban were employed for elderly patients (≥ 80 years) and those with low body weight (≤ 60 kg).

The major inclusion criteria were confirmed COVID-19 infection with symptomatic systemic involvement. The major exclusion criteria were need for ICU level of care or active bleeding.

The therapeutic anticoagulation arms performed similarly and were combined for comparison to the prophylactic arm. Despite the failure to show a difference in the primary outcome, the rate of 30-day mortality was substantially lower in the therapeutic arm (4.9% vs. 7.0%), translating into a 30% risk reduction (HR, 0.70; P = .01).

Therapeutic anticoagulation was also associated with a lower rate of intubation/mechanical ventilation (6.4% vs. 8.4%) that reached statistical significance (HR, 0.75; P = .03). The risk reduction was also significant for a combination of these endpoints (HR, 0.77; P = .03).

The lower proportion of patients who eventually required ICU-level of care (9.9% vs. 11.7%) showed a trend in favor of therapeutic anticoagulation (HR, 0.84; P = .11).
 

Bleeding rates did not differ between arms

Bleeding Academic Research Consortium major bleeding types 3 and 5 were slightly numerically higher in the group randomized to therapeutic enoxaparin (0.5%) than prophylactic enoxaparin (0.1%) and therapeutic apixaban (0.3%), but the differences between any groups were not significant.

Numerous anticoagulation trials in patients with COVID-19 have been published previously. One 2021 trial published in the New England Journal of Medicine also suggested benefit from a therapeutic relative to prophylactic anticoagulation. In that trial, which compared heparin to usual-care thromboprophylaxis, benefits were derived from a Bayesian analysis. Significant differences were not shown for death or other major outcome assessed individually.

Even though this more recent trial missed its primary endpoint, Gregg Stone, MD, a coauthor of this study and a colleague of Dr. Fuster at the Mount Sinai School of Medicine, New York, reiterated that these results support routine anticoagulation in hospitalized COVID-19 patients.

“These are robust reductions in mortality and intubation rates, which are the most serious outcomes,” said Dr. Stone, who is first author of the paper, which was published in the Journal of the American College of Cardiology immediately after Dr. Fuster’s presentation.

COVID-19 has proven to be a very thrombogenic virus, but the literature has not been wholly consistent on which anticoagulation treatment provides the best balance of benefits and risks, according to Julia Grapsa, MD, PhD, attending cardiologist, Guys and St. Thomas Hospital, London. She said that this randomized trial, despite its failure to meet the primary endpoint, is useful.

“This demonstrates that a therapeutic dose of enoxaparin is likely to improve outcomes over a prophylactic dose with a low risk of bleeding,” Dr. Grapsa said. On the basis of the randomized study, “I feel more confident with this approach.”

Dr. Fuster reported no potential conflicts of interest. Dr. Stone has financial relationships with more than 30 companies that make pharmaceuticals and medical devices. Dr. Grapsa reported no potential conflicts of interest.

NEW ORLEANS – In the international FREEDOM COVID trial that randomized non–critically ill hospitalized patients, a therapeutic dose of anticoagulation relative to a prophylactic dose significantly reduced death from COVID-19 at 30 days, even as a larger composite primary endpoint was missed.

The mortality reduction suggests therapeutic-dose anticoagulation “may improve outcomes in non–critically ill patients hospitalized with COVID-19 who are at increased risk for adverse events but do not yet require ICU-level of care,” reported Valentin Fuster, MD, PhD, at the joint scientific sessions of the American College of Cardiology and the World Heart Federation.

Ted Bosworth/MDedge News

These data provide a suggestion rather than a demonstration of benefit because the primary composite endpoint of all-cause mortality, intubation requiring mechanical ventilation, systemic thromboembolism or ischemic stroke at 30 days was not met. Although this 30-day outcome was lower on the therapeutic dose (11.3% vs. 13.2%), the difference was only a trend (hazard ratio, 0.85; P = .11), said Dr. Fuster, physician-in-chief, Mount Sinai Hospital, New York.
 

Missed primary endpoint blamed on low events

The declining severity of more recent COVID-19 variants (the trial was conducted from August 2022 to September 2022) might be one explanation that the primary endpoint was not met, but the more likely explanation is the relatively good health status – and therefore a low risk of events – among patients randomized in India, 1 of 10 participating countries.

India accounted for roughly 40% of the total number of 3,398 patients in the intention-to-treat population. In India, the rates of events were 0.7 and 1.3 in the prophylactic and therapeutic anticoagulation arms, respectively. In contrast, they were 17.5 and 9.5, respectively in the United States. In combined data from the other eight countries, the rates were 22.78 and 20.4, respectively.

“These results emphasize that varying country-specific thresholds for hospitalization may affect patient prognosis and the potential utility of advanced therapies” Dr. Fuster said.

In fact, the therapeutic anticoagulation was linked to a nonsignificant twofold increase in the risk of the primary outcome in India (HR, 2.01; 95% confidence interval, 0.57-7.13) when outcomes were stratified by country. In the United States, where there was a much higher incidence of events, therapeutic anticoagulation was associated with a nearly 50% reduction (HR, 0.53; 95% CI, 0.31-0.91).

In the remaining countries, which included those in Latin America and Europe as well as the city of Hong Kong, the primary outcome was reduced numerically but not statistically by therapeutic relative to prophylactic anticoagulation (HR, 0.89; 95% CI, 0.71-1.11).
 

Enoxaparin and apixaban are studied

In FREEDOM COVID, patients were randomized to a therapeutic dose of the low-molecular-weight heparin (LMWH) enoxaparin (1 mg/kg every 12 hours), a prophylactic dose of enoxaparin (40 mg once daily), or a therapeutic dose of the direct factor Xa inhibitor apixaban (5 mg every 12 hours). Lower doses of enoxaparin and apixaban were used for those with renal impairment, and lower doses of apixaban were employed for elderly patients (≥ 80 years) and those with low body weight (≤ 60 kg).

The major inclusion criteria were confirmed COVID-19 infection with symptomatic systemic involvement. The major exclusion criteria were need for ICU level of care or active bleeding.

The therapeutic anticoagulation arms performed similarly and were combined for comparison to the prophylactic arm. Despite the failure to show a difference in the primary outcome, the rate of 30-day mortality was substantially lower in the therapeutic arm (4.9% vs. 7.0%), translating into a 30% risk reduction (HR, 0.70; P = .01).

Therapeutic anticoagulation was also associated with a lower rate of intubation/mechanical ventilation (6.4% vs. 8.4%) that reached statistical significance (HR, 0.75; P = .03). The risk reduction was also significant for a combination of these endpoints (HR, 0.77; P = .03).

The lower proportion of patients who eventually required ICU-level of care (9.9% vs. 11.7%) showed a trend in favor of therapeutic anticoagulation (HR, 0.84; P = .11).
 

Bleeding rates did not differ between arms

Bleeding Academic Research Consortium major bleeding types 3 and 5 were slightly numerically higher in the group randomized to therapeutic enoxaparin (0.5%) than prophylactic enoxaparin (0.1%) and therapeutic apixaban (0.3%), but the differences between any groups were not significant.

Numerous anticoagulation trials in patients with COVID-19 have been published previously. One 2021 trial published in the New England Journal of Medicine also suggested benefit from a therapeutic relative to prophylactic anticoagulation. In that trial, which compared heparin to usual-care thromboprophylaxis, benefits were derived from a Bayesian analysis. Significant differences were not shown for death or other major outcome assessed individually.

Even though this more recent trial missed its primary endpoint, Gregg Stone, MD, a coauthor of this study and a colleague of Dr. Fuster at the Mount Sinai School of Medicine, New York, reiterated that these results support routine anticoagulation in hospitalized COVID-19 patients.

“These are robust reductions in mortality and intubation rates, which are the most serious outcomes,” said Dr. Stone, who is first author of the paper, which was published in the Journal of the American College of Cardiology immediately after Dr. Fuster’s presentation.

COVID-19 has proven to be a very thrombogenic virus, but the literature has not been wholly consistent on which anticoagulation treatment provides the best balance of benefits and risks, according to Julia Grapsa, MD, PhD, attending cardiologist, Guys and St. Thomas Hospital, London. She said that this randomized trial, despite its failure to meet the primary endpoint, is useful.

“This demonstrates that a therapeutic dose of enoxaparin is likely to improve outcomes over a prophylactic dose with a low risk of bleeding,” Dr. Grapsa said. On the basis of the randomized study, “I feel more confident with this approach.”

Dr. Fuster reported no potential conflicts of interest. Dr. Stone has financial relationships with more than 30 companies that make pharmaceuticals and medical devices. Dr. Grapsa reported no potential conflicts of interest.

Individuals with a history of depressive symptoms have a 46% higher risk for stroke than those with no depression history, new research suggests.

Data from the international INTERSTROKE study also showed that those with depressive symptoms before a stroke had worse outcomes, including a significantly higher mortality rate in the first month after a stroke.

These findings build on prior research on the link between depression and stroke, including one study that showed an increased risk for incident stroke among those with a high number of depressive symptoms and another that found that worsening depression can precede stroke in older adults.

“Depression is an important risk factor for acute stroke and is potentially a modifiable contributor to the global burden of stroke,” lead investigator Robert Murphy, MB, a consultant in stroke and geriatric medicine and a researcher with the clinical research facility at the University of Galway, Ireland, told this news organization. “Even mild depressive symptoms were found in this study to be associated with increased risk of stroke and this adds to the literature that across the full range of depressive symptoms there is an association with increased risk of stroke.”

The findings were published online March 8 in Neurology.
 

Significant stroke risk

For the analysis, investigators collected data on 26,877 cases and controls across 32 countries who participated in INTERSTROKE, an international case-control study of risk factors for a first acute stroke. Participants were recruited between 2007 and 2015 and completed a series of questionnaires about stroke risk factors, including measures of depressive symptoms experienced in the past 12 months.

After adjustment for occupation, education, wealth index, diet, physical activity, alcohol consumption, and smoking history, having prestroke depressive symptoms was associated with greater odds for acute stroke (adjusted odds ratio [aOR], 1.46; 95% confidence interval [CI], 1.34-1.58), including both intracerebral hemorrhage (aOR, 1.56; 95% CI, 1.28-1.91) and ischemic stroke (aOR, 1.44; 95% CI, 1.31-1.58).

Stroke risk increased with increasing severity of depression, but even those with mild depression had a 35% increased risk (aOR, 1.35; 95% CI, 1.19-1.53).

The increased risk held even after the researchers adjusted further for diabetes, hypertension, atrial fibrillation, and body mass index, and work, home, and financial stress.

The association was consistent across geographical regions and age groups, but was stronger in men and in those without hypertension.

“This study looks at different constructs of depression and identifies that across the spectrum of mild, moderate, and severe depressive symptoms that there is an association present with acute stroke and that a biological gradient emerges with increasing burden of depressive symptoms associated with increasing risk,” Dr. Murphy said.
 

An antidepressant mediating effect?

While prestroke depressive symptoms were not associated with a greater odds of worse stroke severity, they were associated with worse outcomes (P < .001) and higher mortality (10% vs. 8.1%; P = .003) 1 month after a stroke.

In a subgroup analysis, researchers found no association between depressive symptoms and stroke risk in patients who were taking antidepressants.

While no assumptions of causality can be drawn from these findings, “this subgroup analysis does suggest that an increased risk of stroke in those with depression may be attenuated if a patient is on appropriate treatment,” Dr. Murphy said. “This is an area that warrants further exploration.”

The mechanisms that link depression to stroke are unclear, but these findings offer strong evidence that this link exists, Dr. Murphy said.

“We adjusted for potential confounders in sequential models and after adjusting for traditional cardiovascular risk factors there was a consistent association between depressive symptoms and stroke identifying that there is likely an independent association between depression and stroke,” Dr. Murphy said.
 

Questions remain

Commenting on the study, Daniel T. Lackland DrPH, professor, division of translational neurosciences and population studies, department of neurology, Medical University of South Carolina, Charleston, said it adds to a growing body of work on the association of stroke and depression.

“In this case, depression may be a risk factor for having a stroke,” said Dr. Lackland, who was not part of the study. In addition, the study suggests that “treating depression can have additional benefits beyond mental health, in this case, reduced stroke risks.”

However, it’s important, as with any observational study, that there may be confounding factors that may offer an alternative explanation for the findings.

“Further, it is often difficult to accurately assess depression in all individuals, and specifically in individuals who have had a stroke,” Dr. Lackland said. “While this particular study adds depression as a risk factor and suggests treatment of depression in reducing risks, it is important to emphasize that the traditional stroke risk factors including hypertension should [be] continually recognized and treat[ed] with high rigor.”

The INTERSTROKE study was funded by the Canadian Institutes of Health Research, the Heart and Stroke Foundation of Canada, the Canadian Stroke Network, the Swedish Research Council, the Swedish Heart Lung Foundation, AFA Insurance, The Health & Medical Care Committee of the Regional Executive Board, Region Västra Götaland, and through unrestricted grants from several pharmaceutical companies with major contributions from AstraZeneca, Boehringer Ingelheim (Canada), Pfizer (Canada), Merck Sharp & Dohme, the Swedish Heart Lung Foundation, Chest Heart & Stroke Scotland, and the Stroke Association (United Kingdom). Dr. Murphy and Dr. Lackland have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Individuals with a history of depressive symptoms have a 46% higher risk for stroke than those with no depression history, new research suggests.

Data from the international INTERSTROKE study also showed that those with depressive symptoms before a stroke had worse outcomes, including a significantly higher mortality rate in the first month after a stroke.

These findings build on prior research on the link between depression and stroke, including one study that showed an increased risk for incident stroke among those with a high number of depressive symptoms and another that found that worsening depression can precede stroke in older adults.

“Depression is an important risk factor for acute stroke and is potentially a modifiable contributor to the global burden of stroke,” lead investigator Robert Murphy, MB, a consultant in stroke and geriatric medicine and a researcher with the clinical research facility at the University of Galway, Ireland, told this news organization. “Even mild depressive symptoms were found in this study to be associated with increased risk of stroke and this adds to the literature that across the full range of depressive symptoms there is an association with increased risk of stroke.”

The findings were published online March 8 in Neurology.
 

Significant stroke risk

For the analysis, investigators collected data on 26,877 cases and controls across 32 countries who participated in INTERSTROKE, an international case-control study of risk factors for a first acute stroke. Participants were recruited between 2007 and 2015 and completed a series of questionnaires about stroke risk factors, including measures of depressive symptoms experienced in the past 12 months.

After adjustment for occupation, education, wealth index, diet, physical activity, alcohol consumption, and smoking history, having prestroke depressive symptoms was associated with greater odds for acute stroke (adjusted odds ratio [aOR], 1.46; 95% confidence interval [CI], 1.34-1.58), including both intracerebral hemorrhage (aOR, 1.56; 95% CI, 1.28-1.91) and ischemic stroke (aOR, 1.44; 95% CI, 1.31-1.58).

Stroke risk increased with increasing severity of depression, but even those with mild depression had a 35% increased risk (aOR, 1.35; 95% CI, 1.19-1.53).

The increased risk held even after the researchers adjusted further for diabetes, hypertension, atrial fibrillation, and body mass index, and work, home, and financial stress.

The association was consistent across geographical regions and age groups, but was stronger in men and in those without hypertension.

“This study looks at different constructs of depression and identifies that across the spectrum of mild, moderate, and severe depressive symptoms that there is an association present with acute stroke and that a biological gradient emerges with increasing burden of depressive symptoms associated with increasing risk,” Dr. Murphy said.
 

An antidepressant mediating effect?

While prestroke depressive symptoms were not associated with a greater odds of worse stroke severity, they were associated with worse outcomes (P < .001) and higher mortality (10% vs. 8.1%; P = .003) 1 month after a stroke.

In a subgroup analysis, researchers found no association between depressive symptoms and stroke risk in patients who were taking antidepressants.

While no assumptions of causality can be drawn from these findings, “this subgroup analysis does suggest that an increased risk of stroke in those with depression may be attenuated if a patient is on appropriate treatment,” Dr. Murphy said. “This is an area that warrants further exploration.”

The mechanisms that link depression to stroke are unclear, but these findings offer strong evidence that this link exists, Dr. Murphy said.

“We adjusted for potential confounders in sequential models and after adjusting for traditional cardiovascular risk factors there was a consistent association between depressive symptoms and stroke identifying that there is likely an independent association between depression and stroke,” Dr. Murphy said.
 

Questions remain

Commenting on the study, Daniel T. Lackland DrPH, professor, division of translational neurosciences and population studies, department of neurology, Medical University of South Carolina, Charleston, said it adds to a growing body of work on the association of stroke and depression.

“In this case, depression may be a risk factor for having a stroke,” said Dr. Lackland, who was not part of the study. In addition, the study suggests that “treating depression can have additional benefits beyond mental health, in this case, reduced stroke risks.”

However, it’s important, as with any observational study, that there may be confounding factors that may offer an alternative explanation for the findings.

“Further, it is often difficult to accurately assess depression in all individuals, and specifically in individuals who have had a stroke,” Dr. Lackland said. “While this particular study adds depression as a risk factor and suggests treatment of depression in reducing risks, it is important to emphasize that the traditional stroke risk factors including hypertension should [be] continually recognized and treat[ed] with high rigor.”

The INTERSTROKE study was funded by the Canadian Institutes of Health Research, the Heart and Stroke Foundation of Canada, the Canadian Stroke Network, the Swedish Research Council, the Swedish Heart Lung Foundation, AFA Insurance, The Health & Medical Care Committee of the Regional Executive Board, Region Västra Götaland, and through unrestricted grants from several pharmaceutical companies with major contributions from AstraZeneca, Boehringer Ingelheim (Canada), Pfizer (Canada), Merck Sharp & Dohme, the Swedish Heart Lung Foundation, Chest Heart & Stroke Scotland, and the Stroke Association (United Kingdom). Dr. Murphy and Dr. Lackland have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Individuals with a history of depressive symptoms have a 46% higher risk for stroke than those with no depression history, new research suggests.

Data from the international INTERSTROKE study also showed that those with depressive symptoms before a stroke had worse outcomes, including a significantly higher mortality rate in the first month after a stroke.

These findings build on prior research on the link between depression and stroke, including one study that showed an increased risk for incident stroke among those with a high number of depressive symptoms and another that found that worsening depression can precede stroke in older adults.

“Depression is an important risk factor for acute stroke and is potentially a modifiable contributor to the global burden of stroke,” lead investigator Robert Murphy, MB, a consultant in stroke and geriatric medicine and a researcher with the clinical research facility at the University of Galway, Ireland, told this news organization. “Even mild depressive symptoms were found in this study to be associated with increased risk of stroke and this adds to the literature that across the full range of depressive symptoms there is an association with increased risk of stroke.”

The findings were published online March 8 in Neurology.
 

Significant stroke risk

For the analysis, investigators collected data on 26,877 cases and controls across 32 countries who participated in INTERSTROKE, an international case-control study of risk factors for a first acute stroke. Participants were recruited between 2007 and 2015 and completed a series of questionnaires about stroke risk factors, including measures of depressive symptoms experienced in the past 12 months.

After adjustment for occupation, education, wealth index, diet, physical activity, alcohol consumption, and smoking history, having prestroke depressive symptoms was associated with greater odds for acute stroke (adjusted odds ratio [aOR], 1.46; 95% confidence interval [CI], 1.34-1.58), including both intracerebral hemorrhage (aOR, 1.56; 95% CI, 1.28-1.91) and ischemic stroke (aOR, 1.44; 95% CI, 1.31-1.58).

Stroke risk increased with increasing severity of depression, but even those with mild depression had a 35% increased risk (aOR, 1.35; 95% CI, 1.19-1.53).

The increased risk held even after the researchers adjusted further for diabetes, hypertension, atrial fibrillation, and body mass index, and work, home, and financial stress.

The association was consistent across geographical regions and age groups, but was stronger in men and in those without hypertension.

“This study looks at different constructs of depression and identifies that across the spectrum of mild, moderate, and severe depressive symptoms that there is an association present with acute stroke and that a biological gradient emerges with increasing burden of depressive symptoms associated with increasing risk,” Dr. Murphy said.
 

An antidepressant mediating effect?

While prestroke depressive symptoms were not associated with a greater odds of worse stroke severity, they were associated with worse outcomes (P < .001) and higher mortality (10% vs. 8.1%; P = .003) 1 month after a stroke.

In a subgroup analysis, researchers found no association between depressive symptoms and stroke risk in patients who were taking antidepressants.

While no assumptions of causality can be drawn from these findings, “this subgroup analysis does suggest that an increased risk of stroke in those with depression may be attenuated if a patient is on appropriate treatment,” Dr. Murphy said. “This is an area that warrants further exploration.”

The mechanisms that link depression to stroke are unclear, but these findings offer strong evidence that this link exists, Dr. Murphy said.

“We adjusted for potential confounders in sequential models and after adjusting for traditional cardiovascular risk factors there was a consistent association between depressive symptoms and stroke identifying that there is likely an independent association between depression and stroke,” Dr. Murphy said.
 

Questions remain

Commenting on the study, Daniel T. Lackland DrPH, professor, division of translational neurosciences and population studies, department of neurology, Medical University of South Carolina, Charleston, said it adds to a growing body of work on the association of stroke and depression.

“In this case, depression may be a risk factor for having a stroke,” said Dr. Lackland, who was not part of the study. In addition, the study suggests that “treating depression can have additional benefits beyond mental health, in this case, reduced stroke risks.”

However, it’s important, as with any observational study, that there may be confounding factors that may offer an alternative explanation for the findings.

“Further, it is often difficult to accurately assess depression in all individuals, and specifically in individuals who have had a stroke,” Dr. Lackland said. “While this particular study adds depression as a risk factor and suggests treatment of depression in reducing risks, it is important to emphasize that the traditional stroke risk factors including hypertension should [be] continually recognized and treat[ed] with high rigor.”

The INTERSTROKE study was funded by the Canadian Institutes of Health Research, the Heart and Stroke Foundation of Canada, the Canadian Stroke Network, the Swedish Research Council, the Swedish Heart Lung Foundation, AFA Insurance, The Health & Medical Care Committee of the Regional Executive Board, Region Västra Götaland, and through unrestricted grants from several pharmaceutical companies with major contributions from AstraZeneca, Boehringer Ingelheim (Canada), Pfizer (Canada), Merck Sharp & Dohme, the Swedish Heart Lung Foundation, Chest Heart & Stroke Scotland, and the Stroke Association (United Kingdom). Dr. Murphy and Dr. Lackland have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Consumption of a low-carbohydrate, high-fat diet, dubbed a “keto-like” diet, was associated with an increase in LDL levels and a twofold increase in the risk for future cardiovascular events, in a new observational study.

“To our knowledge this is the first study to demonstrate an association between a carbohydrate-restricted dietary platform and greater risk of atherosclerotic cardiovascular disease,” said study investigator Iulia Iatan, MD, PhD, University of British Columbia, Vancouver.

a_namenko/Getty Images

“Hypercholesterolemia occurring during a low-carb, high-fat diet should not be assumed to be benign,” she concluded.

Dr. Iatan presented the study March 5 at the joint scientific sessions of the American College of Cardiology and the World Heart Federation.

The presentation received much media attention, with headlines implying a causal relationship with cardiac events based on these observational results. But lipid expert Steven Nissen, MD, of the Cleveland Clinic, warned against paying much attention to the headlines or to the study’s conclusions.

In an interview, Dr. Nissen pointed out that the LDL increase in the “keto-like” diet group was relatively small and “certainly not enough to produce a doubling in cardiovascular risk.

“The people who were on the ‘keto-like’ diet in this study were different than those who were on the standard diet,” he said. “Those on the ‘keto-like’ diet were on it for a reason – they were more overweight, they had a higher incidence of diabetes, so their risk profile was completely different. Even though the researchers tried to adjust for other cardiovascular risk factors, there will be unmeasured confounding in a study like this.”

He said he doesn’t think this study “answers any significant questions in a way that we want to have them answered. I’m not a big fan of this type of diet, but I don’t think it doubles the risk of adverse cardiovascular events, and I don’t think this study tells us one way or another.” 

For the study, Dr. Iatan and colleagues defined a low-carbohydrate, high-fat diet as consisting of no more than 25% of total daily energy from carbohydrates and more than 45% of total daily calories from fat. This is somewhat higher in carbohydrates and lower in fat than a strict ketogenic diet but could be thought of as a ‘keto-like’ diet.

They analyzed data from the UK Biobank, a large-scale prospective database with health information from over half a million people living in the United Kingdom who were followed for at least 10 years.

On enrollment in the Biobank, participants completed a one-time, self-reported 24-hour diet questionnaire and, at the same time, had blood drawn to check their levels of cholesterol. The researchers identified 305 participants whose questionnaire responses indicated that they followed a low-carbohydrate, high-fat diet. These participants were matched by age and sex with 1,220 individuals who reported being on a standard diet.

Of the study population, 73% were women and the average age was 54 years. Those on a low carbohydrate/high fat diet had a higher average body mass index (27.7 vs. 26.7) and a higher incidence of diabetes (4.9% vs. 1.7%).

Results showed that compared with participants on a standard diet, those on the “keto-like” diet had significantly higher levels of both LDL cholesterol and apolipoprotein B (ApoB).

Levels of LDL were 3.80 mmol/L (147 mg/dL) in the keto-like group vs. 3.64 mmol/L (141 mg/dL) in the standard group (P = .004).  Levels of ApoB were 1.09 g/L (109 mg/dL) in the keto-like group and 1.04 g/L (104 mg/dL) in the standard group (P < .001).

After an average of 11.8 years of follow-up, 9.8% of participants on the low-carbohydrate/high-fat diet vs. 4.3% in the standard diet group experienced one of the events included in the composite event endpoint: Angina, myocardial infarction, coronary artery disease, ischemic stroke, peripheral arterial disease, or coronary/carotid revascularization.

After adjustment for other risk factors for heart disease – diabetes, hypertension, obesity, and smoking – individuals on a low-carbohydrate, high-fat diet were found to have a twofold risk of having a cardiovascular event (HR, 2.18; P < .001).
 

‘Closer monitoring needed’

“Our results have shown, I think for the first time, that there is an association between this increasingly popular dietary pattern and high LDL cholesterol and an increased future risk of cardiovascular events,” senior author Liam Brunham, MD, of the University of British Columbia, said in an interview. “This is concerning as there are many people out there following this type of diet, and I think it suggests there is a need for closer monitoring of these people.”

He explained that while it would be expected for cholesterol levels to rise on a high-fat diet, “there has been a perception by some that this is not worrisome as it is reflecting certain metabolic changes. What we’ve shown in this study is that if your cholesterol does increase significantly on this diet then you should not assume that this is not a problem.

“For some people with diabetes this diet can help lower blood sugar and some people can lose weight on it,” he noted, “but what our data show is that there is a subgroup of people who experience high levels of LDL and ApoB and that seems to be driving the risk.”

He pointed out that overall the mean level of LDL was only slightly increased in the individuals on the low-carb/high-fat diet but severe high cholesterol (more than 5 mmol/L or 190 mg/dL) was about doubled in that group (10% vs. 5%). And these patients had a sixfold increase in risk of cardiovascular disease (P < .001). 

“This suggests that there is a subgroup of people who are susceptible to this exacerbation of hypercholesterolemia in response to a low-carb/high-fat diet.”

Dr. Brunham said his advice would be that if people choose to follow this diet, they should have their cholesterol monitored, and manage their cardiovascular risk factors.

“I wouldn’t say it is not appropriate to follow this diet based on this study,” he added. “This is just an observational study. It is not definitive. But if people do want to follow this dietary pattern because they feel there would be some benefits, then they should be aware of the potential risks and take steps to mitigate those risks.”
 

Jury still out

Dr. Nissen said in his view “the jury was still out” on this type of diet. “I’m open to the possibility that, particularly in the short run, a ‘keto-like’ diet may help some people lose weight and that’s a good thing. But I do not generally recommend this type of diet.”

Rather, he advises patients to follow a Mediterranean diet, which has been proven to reduce cardiovascular events in a randomized study, the PREDIMED trial.  

“We can’t make decisions on what type of diet to recommend to patients based on observational studies like this where there is a lot of subtlety missing. But when studies like this are reported, the mass media seize on it. That’s not the way the public needs to be educated,” Dr. Nissen said. 

“We refer to this type of study as hypothesis-generating. It raises a hypothesis. It doesn’t answer the question. It is worth looking at the question of whether a ketogenic-like diet is harmful. We don’t know at present, and I don’t think we know any more after this study,” he added.

The authors of the study reported no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Consumption of a low-carbohydrate, high-fat diet, dubbed a “keto-like” diet, was associated with an increase in LDL levels and a twofold increase in the risk for future cardiovascular events, in a new observational study.

“To our knowledge this is the first study to demonstrate an association between a carbohydrate-restricted dietary platform and greater risk of atherosclerotic cardiovascular disease,” said study investigator Iulia Iatan, MD, PhD, University of British Columbia, Vancouver.

a_namenko/Getty Images

“Hypercholesterolemia occurring during a low-carb, high-fat diet should not be assumed to be benign,” she concluded.

Dr. Iatan presented the study March 5 at the joint scientific sessions of the American College of Cardiology and the World Heart Federation.

The presentation received much media attention, with headlines implying a causal relationship with cardiac events based on these observational results. But lipid expert Steven Nissen, MD, of the Cleveland Clinic, warned against paying much attention to the headlines or to the study’s conclusions.

In an interview, Dr. Nissen pointed out that the LDL increase in the “keto-like” diet group was relatively small and “certainly not enough to produce a doubling in cardiovascular risk.

“The people who were on the ‘keto-like’ diet in this study were different than those who were on the standard diet,” he said. “Those on the ‘keto-like’ diet were on it for a reason – they were more overweight, they had a higher incidence of diabetes, so their risk profile was completely different. Even though the researchers tried to adjust for other cardiovascular risk factors, there will be unmeasured confounding in a study like this.”

He said he doesn’t think this study “answers any significant questions in a way that we want to have them answered. I’m not a big fan of this type of diet, but I don’t think it doubles the risk of adverse cardiovascular events, and I don’t think this study tells us one way or another.” 

For the study, Dr. Iatan and colleagues defined a low-carbohydrate, high-fat diet as consisting of no more than 25% of total daily energy from carbohydrates and more than 45% of total daily calories from fat. This is somewhat higher in carbohydrates and lower in fat than a strict ketogenic diet but could be thought of as a ‘keto-like’ diet.

They analyzed data from the UK Biobank, a large-scale prospective database with health information from over half a million people living in the United Kingdom who were followed for at least 10 years.

On enrollment in the Biobank, participants completed a one-time, self-reported 24-hour diet questionnaire and, at the same time, had blood drawn to check their levels of cholesterol. The researchers identified 305 participants whose questionnaire responses indicated that they followed a low-carbohydrate, high-fat diet. These participants were matched by age and sex with 1,220 individuals who reported being on a standard diet.

Of the study population, 73% were women and the average age was 54 years. Those on a low carbohydrate/high fat diet had a higher average body mass index (27.7 vs. 26.7) and a higher incidence of diabetes (4.9% vs. 1.7%).

Results showed that compared with participants on a standard diet, those on the “keto-like” diet had significantly higher levels of both LDL cholesterol and apolipoprotein B (ApoB).

Levels of LDL were 3.80 mmol/L (147 mg/dL) in the keto-like group vs. 3.64 mmol/L (141 mg/dL) in the standard group (P = .004).  Levels of ApoB were 1.09 g/L (109 mg/dL) in the keto-like group and 1.04 g/L (104 mg/dL) in the standard group (P < .001).

After an average of 11.8 years of follow-up, 9.8% of participants on the low-carbohydrate/high-fat diet vs. 4.3% in the standard diet group experienced one of the events included in the composite event endpoint: Angina, myocardial infarction, coronary artery disease, ischemic stroke, peripheral arterial disease, or coronary/carotid revascularization.

After adjustment for other risk factors for heart disease – diabetes, hypertension, obesity, and smoking – individuals on a low-carbohydrate, high-fat diet were found to have a twofold risk of having a cardiovascular event (HR, 2.18; P < .001).
 

‘Closer monitoring needed’

“Our results have shown, I think for the first time, that there is an association between this increasingly popular dietary pattern and high LDL cholesterol and an increased future risk of cardiovascular events,” senior author Liam Brunham, MD, of the University of British Columbia, said in an interview. “This is concerning as there are many people out there following this type of diet, and I think it suggests there is a need for closer monitoring of these people.”

He explained that while it would be expected for cholesterol levels to rise on a high-fat diet, “there has been a perception by some that this is not worrisome as it is reflecting certain metabolic changes. What we’ve shown in this study is that if your cholesterol does increase significantly on this diet then you should not assume that this is not a problem.

“For some people with diabetes this diet can help lower blood sugar and some people can lose weight on it,” he noted, “but what our data show is that there is a subgroup of people who experience high levels of LDL and ApoB and that seems to be driving the risk.”

He pointed out that overall the mean level of LDL was only slightly increased in the individuals on the low-carb/high-fat diet but severe high cholesterol (more than 5 mmol/L or 190 mg/dL) was about doubled in that group (10% vs. 5%). And these patients had a sixfold increase in risk of cardiovascular disease (P < .001). 

“This suggests that there is a subgroup of people who are susceptible to this exacerbation of hypercholesterolemia in response to a low-carb/high-fat diet.”

Dr. Brunham said his advice would be that if people choose to follow this diet, they should have their cholesterol monitored, and manage their cardiovascular risk factors.

“I wouldn’t say it is not appropriate to follow this diet based on this study,” he added. “This is just an observational study. It is not definitive. But if people do want to follow this dietary pattern because they feel there would be some benefits, then they should be aware of the potential risks and take steps to mitigate those risks.”
 

Jury still out

Dr. Nissen said in his view “the jury was still out” on this type of diet. “I’m open to the possibility that, particularly in the short run, a ‘keto-like’ diet may help some people lose weight and that’s a good thing. But I do not generally recommend this type of diet.”

Rather, he advises patients to follow a Mediterranean diet, which has been proven to reduce cardiovascular events in a randomized study, the PREDIMED trial.  

“We can’t make decisions on what type of diet to recommend to patients based on observational studies like this where there is a lot of subtlety missing. But when studies like this are reported, the mass media seize on it. That’s not the way the public needs to be educated,” Dr. Nissen said. 

“We refer to this type of study as hypothesis-generating. It raises a hypothesis. It doesn’t answer the question. It is worth looking at the question of whether a ketogenic-like diet is harmful. We don’t know at present, and I don’t think we know any more after this study,” he added.

The authors of the study reported no relevant financial relationships.

A version of this article originally appeared on Medscape.com.

Consumption of a low-carbohydrate, high-fat diet, dubbed a “keto-like” diet, was associated with an increase in LDL levels and a twofold increase in the risk for future cardiovascular events, in a new observational study.

“To our knowledge this is the first study to demonstrate an association between a carbohydrate-restricted dietary platform and greater risk of atherosclerotic cardiovascular disease,” said study investigator Iulia Iatan, MD, PhD, University of British Columbia, Vancouver.

a_namenko/Getty Images

“Hypercholesterolemia occurring during a low-carb, high-fat diet should not be assumed to be benign,” she concluded.

Dr. Iatan presented the study March 5 at the joint scientific sessions of the American College of Cardiology and the World Heart Federation.

The presentation received much media attention, with headlines implying a causal relationship with cardiac events based on these observational results. But lipid expert Steven Nissen, MD, of the Cleveland Clinic, warned against paying much attention to the headlines or to the study’s conclusions.

In an interview, Dr. Nissen pointed out that the LDL increase in the “keto-like” diet group was relatively small and “certainly not enough to produce a doubling in cardiovascular risk.

“The people who were on the ‘keto-like’ diet in this study were different than those who were on the standard diet,” he said. “Those on the ‘keto-like’ diet were on it for a reason – they were more overweight, they had a higher incidence of diabetes, so their risk profile was completely different. Even though the researchers tried to adjust for other cardiovascular risk factors, there will be unmeasured confounding in a study like this.”

He said he doesn’t think this study “answers any significant questions in a way that we want to have them answered. I’m not a big fan of this type of diet, but I don’t think it doubles the risk of adverse cardiovascular events, and I don’t think this study tells us one way or another.” 

For the study, Dr. Iatan and colleagues defined a low-carbohydrate, high-fat diet as consisting of no more than 25% of total daily energy from carbohydrates and more than 45% of total daily calories from fat. This is somewhat higher in carbohydrates and lower in fat than a strict ketogenic diet but could be thought of as a ‘keto-like’ diet.

They analyzed data from the UK Biobank, a large-scale prospective database with health information from over half a million people living in the United Kingdom who were followed for at least 10 years.

On enrollment in the Biobank, participants completed a one-time, self-reported 24-hour diet questionnaire and, at the same time, had blood drawn to check their levels of cholesterol. The researchers identified 305 participants whose questionnaire responses indicated that they followed a low-carbohydrate, high-fat diet. These participants were matched by age and sex with 1,220 individuals who reported being on a standard diet.

Of the study population, 73% were women and the average age was 54 years. Those on a low carbohydrate/high fat diet had a higher average body mass index (27.7 vs. 26.7) and a higher incidence of diabetes (4.9% vs. 1.7%).

Results showed that compared with participants on a standard diet, those on the “keto-like” diet had significantly higher levels of both LDL cholesterol and apolipoprotein B (ApoB).

Levels of LDL were 3.80 mmol/L (147 mg/dL) in the keto-like group vs. 3.64 mmol/L (141 mg/dL) in the standard group (P = .004).  Levels of ApoB were 1.09 g/L (109 mg/dL) in the keto-like group and 1.04 g/L (104 mg/dL) in the standard group (P < .001).

After an average of 11.8 years of follow-up, 9.8% of participants on the low-carbohydrate/high-fat diet vs. 4.3% in the standard diet group experienced one of the events included in the composite event endpoint: Angina, myocardial infarction, coronary artery disease, ischemic stroke, peripheral arterial disease, or coronary/carotid revascularization.

After adjustment for other risk factors for heart disease – diabetes, hypertension, obesity, and smoking – individuals on a low-carbohydrate, high-fat diet were found to have a twofold risk of having a cardiovascular event (HR, 2.18; P < .001).
 

‘Closer monitoring needed’

“Our results have shown, I think for the first time, that there is an association between this increasingly popular dietary pattern and high LDL cholesterol and an increased future risk of cardiovascular events,” senior author Liam Brunham, MD, of the University of British Columbia, said in an interview. “This is concerning as there are many people out there following this type of diet, and I think it suggests there is a need for closer monitoring of these people.”

He explained that while it would be expected for cholesterol levels to rise on a high-fat diet, “there has been a perception by some that this is not worrisome as it is reflecting certain metabolic changes. What we’ve shown in this study is that if your cholesterol does increase significantly on this diet then you should not assume that this is not a problem.

“For some people with diabetes this diet can help lower blood sugar and some people can lose weight on it,” he noted, “but what our data show is that there is a subgroup of people who experience high levels of LDL and ApoB and that seems to be driving the risk.”

He pointed out that overall the mean level of LDL was only slightly increased in the individuals on the low-carb/high-fat diet but severe high cholesterol (more than 5 mmol/L or 190 mg/dL) was about doubled in that group (10% vs. 5%). And these patients had a sixfold increase in risk of cardiovascular disease (P < .001). 

“This suggests that there is a subgroup of people who are susceptible to this exacerbation of hypercholesterolemia in response to a low-carb/high-fat diet.”

Dr. Brunham said his advice would be that if people choose to follow this diet, they should have their cholesterol monitored, and manage their cardiovascular risk factors.

“I wouldn’t say it is not appropriate to follow this diet based on this study,” he added. “This is just an observational study. It is not definitive. But if people do want to follow this dietary pattern because they feel there would be some benefits, then they should be aware of the potential risks and take steps to mitigate those risks.”
 

Jury still out

Dr. Nissen said in his view “the jury was still out” on this type of diet. “I’m open to the possibility that, particularly in the short run, a ‘keto-like’ diet may help some people lose weight and that’s a good thing. But I do not generally recommend this type of diet.”

Rather, he advises patients to follow a Mediterranean diet, which has been proven to reduce cardiovascular events in a randomized study, the PREDIMED trial.  

“We can’t make decisions on what type of diet to recommend to patients based on observational studies like this where there is a lot of subtlety missing. But when studies like this are reported, the mass media seize on it. That’s not the way the public needs to be educated,” Dr. Nissen said. 

“We refer to this type of study as hypothesis-generating. It raises a hypothesis. It doesn’t answer the question. It is worth looking at the question of whether a ketogenic-like diet is harmful. We don’t know at present, and I don’t think we know any more after this study,” he added.

The authors of the study reported no relevant financial relationships.

A version of this article originally appeared on Medscape.com.