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Aspirin may accelerate cancer progression in older adults
Aspirin may accelerate the progression of advanced cancers and lead to an earlier death as a result, new data from the ASPREE study suggest.
The results showed that patients 65 years and older who started taking daily low-dose aspirin had a 19% higher chance of being diagnosed with metastatic cancer, a 22% higher chance of being diagnosed with a stage 4 tumor, and a 31% increased risk of death from stage 4 cancer, when compared with patients who took a placebo.
John J. McNeil, MBBS, PhD, of Monash University in Melbourne, Australia, and colleagues detailed these findings in the Journal of the National Cancer Institute.
“If confirmed, the clinical implications of these findings could be important for the use of aspirin in an older population,” the authors wrote.
When results of the ASPREE study were first reported in 2018, they “raised important concerns,” Ernest Hawk, MD, and Karen Colbert Maresso wrote in an editorial related to the current publication.
“Unlike ARRIVE, ASCEND, and nearly all prior primary prevention CVD [cardiovascular disease] trials of aspirin, ASPREE surprisingly demonstrated increased all-cause mortality in the aspirin group, which appeared to be driven largely by an increase in cancer-related deaths,” wrote the editorialists, who are both from the University of Texas MD Anderson Cancer Center in Houston.
Even though the ASPREE investigators have now taken a deeper dive into their data, the findings “neither explain nor alleviate the concerns raised by the initial ASPREE report,” the editorialists noted.
ASPREE design and results
ASPREE is a multicenter, double-blind trial of 19,114 older adults living in Australia (n = 16,703) or the United States (n = 2,411). Most patients were 70 years or older at baseline. However, the U.S. group also included patients 65 years and older who were racial/ethnic minorities (n = 564).
Patients were randomized to receive 100 mg of enteric-coated aspirin daily (n = 9,525) or matching placebo (n = 9,589) from March 2010 through December 2014.
At inclusion, all participants were free from cardiovascular disease, dementia, or physical disability. A previous history of cancer was not used to exclude participants, and 19.1% of patients had cancer at randomization. Most patients (89%) had not used aspirin regularly before entering the trial.
At a median follow-up of 4.7 years, there were 981 incident cancer events in the aspirin-treated group and 952 in the placebo-treated group, with an overall incident cancer rate of 10.1%.
Of the 1,933 patients with newly diagnosed cancer, 65.7% had a localized cancer, 18.8% had a new metastatic cancer, 5.8% had metastatic disease from an existing cancer, and 9.7% had a new hematologic or lymphatic cancer.
A quarter of cancer patients (n = 495) died as a result of their malignancy, with 52 dying from a cancer they already had at randomization.
Aspirin was not associated with the risk of first incident cancer diagnosis or incident localized cancer diagnosis. The hazard ratios were 1.04 for all incident cancers (95% confidence interval, 0.95-1.14) and 0.99 for incident localized cancers (95% CI, 0.89-1.11).
However, aspirin was associated with an increased risk of metastatic cancer and cancer presenting at stage 4. The HR for metastatic cancer was 1.19 (95% CI, 1.00-1.43), and the HR for newly diagnosed stage 4 cancer was 1.22 (95% CI, 1.02-1.45).
Furthermore, “an increased progression to death was observed amongst those randomized to aspirin, regardless of whether the initial cancer presentation had been localized or metastatic,” the investigators wrote.
The HRs for death were 1.35 for all cancers (95% CI, 1.13-1.61), 1.47 for localized cancers (95% CI, 1.07-2.02), and 1.30 for metastatic cancers (95% CI, 1.03-1.63).
“Deaths were particularly high among those on aspirin who were diagnosed with advanced solid cancers,” study author Andrew Chan, MD, of Massachusetts General Hospital in Boston, said in a press statement.
Indeed, HRs for death in patients with solid tumors presenting at stage 3 and 4 were a respective 2.11 (95% CI, 1.03-4.33) and 1.31 (95% CI, 1.04-1.64). This suggests a possible adverse effect of aspirin on the growth of cancers once they have already developed in older adults, Dr. Chan said.
Where does that leave aspirin for cancer prevention?
“Although these results suggest that we should be cautious about starting aspirin therapy in otherwise healthy older adults, this does not mean that individuals who are already taking aspirin – particularly if they began taking it at a younger age – should stop their aspirin regimen,” Dr. Chan said.
There are decades of data supporting the use of daily aspirin to prevent multiple cancer types, particularly colorectal cancer, in individuals under the age of 70 years. In a recent meta-analysis, for example, regular aspirin use was linked to a 27% reduced risk for colorectal cancer, a 33% reduced risk for squamous cell esophageal cancer, a 39% decreased risk for adenocarcinoma of the esophagus and gastric cardia, a 36% decreased risk for stomach cancer, a 38% decreased risk for hepatobiliary tract cancer, and a 22% decreased risk for pancreatic cancer.
While these figures are mostly based on observational and case-control studies, it “reaffirms the fact that, overall, when you look at all of the ages, that there is still a benefit of aspirin for cancer,” John Cuzick, PhD, of Queen Mary University of London (England), said in an interview.
In fact, the meta-analysis goes as far as suggesting that perhaps the dose of aspirin being used is too low, with the authors noting that there was a 35% risk reduction in colorectal cancer with a dose of 325 mg daily. That’s a new finding, Dr. Cuzick said.
He noted that the ASPREE study largely consists of patients 70 years of age or older, and the authors “draw some conclusions which we can’t ignore about potential safety.”
One of the safety concerns is the increased risk for gastrointestinal bleeding, which is why Dr. Cuzick and colleagues previously recommended caution in the use of aspirin to prevent cancer in elderly patients. The group published a study in 2015 that suggested a benefit of taking aspirin daily for 5-10 years in patients aged 50-65 years, but the risk/benefit ratio was unclear for patients 70 years and older.
The ASPREE data now add to those uncertainties and suggest “there may be some side effects that we do not understand,” Dr. Cuzick said.
“I’m still optimistic that aspirin is going to be important for cancer prevention, but probably focusing on ages 50-70,” he added. “[The ASPREE data] reinforce the caution that we have to take in terms of trying to understand what the side effects are and what’s going on at these older ages.”
Dr. Cuzick is currently leading the AsCaP Project, an international effort to better understand why aspirin might work in preventing some cancer types but not others. AsCaP is supported by Cancer Research UK and also includes Dr. Chan among the researchers attempting to find out which patients may benefit the most from aspirin and which may be at greater risk of adverse effects.
The ASPREE trial was funded by grants from the National Institute on Aging, the National Cancer Institute, the National Health and Medical Research Council of Australia, Monash University, and the Victorian Cancer Agency. Several ASPREE investigators disclosed financial relationships with Bayer Pharma. The editorialists had no conflicts of interest. Dr. Cuzick has been an advisory board member for Bayer in the past.
SOURCE: McNeil J et al. J Natl Cancer Inst. 2020 Aug 11. doi: 10.1093/jnci/djaa114.
Aspirin may accelerate the progression of advanced cancers and lead to an earlier death as a result, new data from the ASPREE study suggest.
The results showed that patients 65 years and older who started taking daily low-dose aspirin had a 19% higher chance of being diagnosed with metastatic cancer, a 22% higher chance of being diagnosed with a stage 4 tumor, and a 31% increased risk of death from stage 4 cancer, when compared with patients who took a placebo.
John J. McNeil, MBBS, PhD, of Monash University in Melbourne, Australia, and colleagues detailed these findings in the Journal of the National Cancer Institute.
“If confirmed, the clinical implications of these findings could be important for the use of aspirin in an older population,” the authors wrote.
When results of the ASPREE study were first reported in 2018, they “raised important concerns,” Ernest Hawk, MD, and Karen Colbert Maresso wrote in an editorial related to the current publication.
“Unlike ARRIVE, ASCEND, and nearly all prior primary prevention CVD [cardiovascular disease] trials of aspirin, ASPREE surprisingly demonstrated increased all-cause mortality in the aspirin group, which appeared to be driven largely by an increase in cancer-related deaths,” wrote the editorialists, who are both from the University of Texas MD Anderson Cancer Center in Houston.
Even though the ASPREE investigators have now taken a deeper dive into their data, the findings “neither explain nor alleviate the concerns raised by the initial ASPREE report,” the editorialists noted.
ASPREE design and results
ASPREE is a multicenter, double-blind trial of 19,114 older adults living in Australia (n = 16,703) or the United States (n = 2,411). Most patients were 70 years or older at baseline. However, the U.S. group also included patients 65 years and older who were racial/ethnic minorities (n = 564).
Patients were randomized to receive 100 mg of enteric-coated aspirin daily (n = 9,525) or matching placebo (n = 9,589) from March 2010 through December 2014.
At inclusion, all participants were free from cardiovascular disease, dementia, or physical disability. A previous history of cancer was not used to exclude participants, and 19.1% of patients had cancer at randomization. Most patients (89%) had not used aspirin regularly before entering the trial.
At a median follow-up of 4.7 years, there were 981 incident cancer events in the aspirin-treated group and 952 in the placebo-treated group, with an overall incident cancer rate of 10.1%.
Of the 1,933 patients with newly diagnosed cancer, 65.7% had a localized cancer, 18.8% had a new metastatic cancer, 5.8% had metastatic disease from an existing cancer, and 9.7% had a new hematologic or lymphatic cancer.
A quarter of cancer patients (n = 495) died as a result of their malignancy, with 52 dying from a cancer they already had at randomization.
Aspirin was not associated with the risk of first incident cancer diagnosis or incident localized cancer diagnosis. The hazard ratios were 1.04 for all incident cancers (95% confidence interval, 0.95-1.14) and 0.99 for incident localized cancers (95% CI, 0.89-1.11).
However, aspirin was associated with an increased risk of metastatic cancer and cancer presenting at stage 4. The HR for metastatic cancer was 1.19 (95% CI, 1.00-1.43), and the HR for newly diagnosed stage 4 cancer was 1.22 (95% CI, 1.02-1.45).
Furthermore, “an increased progression to death was observed amongst those randomized to aspirin, regardless of whether the initial cancer presentation had been localized or metastatic,” the investigators wrote.
The HRs for death were 1.35 for all cancers (95% CI, 1.13-1.61), 1.47 for localized cancers (95% CI, 1.07-2.02), and 1.30 for metastatic cancers (95% CI, 1.03-1.63).
“Deaths were particularly high among those on aspirin who were diagnosed with advanced solid cancers,” study author Andrew Chan, MD, of Massachusetts General Hospital in Boston, said in a press statement.
Indeed, HRs for death in patients with solid tumors presenting at stage 3 and 4 were a respective 2.11 (95% CI, 1.03-4.33) and 1.31 (95% CI, 1.04-1.64). This suggests a possible adverse effect of aspirin on the growth of cancers once they have already developed in older adults, Dr. Chan said.
Where does that leave aspirin for cancer prevention?
“Although these results suggest that we should be cautious about starting aspirin therapy in otherwise healthy older adults, this does not mean that individuals who are already taking aspirin – particularly if they began taking it at a younger age – should stop their aspirin regimen,” Dr. Chan said.
There are decades of data supporting the use of daily aspirin to prevent multiple cancer types, particularly colorectal cancer, in individuals under the age of 70 years. In a recent meta-analysis, for example, regular aspirin use was linked to a 27% reduced risk for colorectal cancer, a 33% reduced risk for squamous cell esophageal cancer, a 39% decreased risk for adenocarcinoma of the esophagus and gastric cardia, a 36% decreased risk for stomach cancer, a 38% decreased risk for hepatobiliary tract cancer, and a 22% decreased risk for pancreatic cancer.
While these figures are mostly based on observational and case-control studies, it “reaffirms the fact that, overall, when you look at all of the ages, that there is still a benefit of aspirin for cancer,” John Cuzick, PhD, of Queen Mary University of London (England), said in an interview.
In fact, the meta-analysis goes as far as suggesting that perhaps the dose of aspirin being used is too low, with the authors noting that there was a 35% risk reduction in colorectal cancer with a dose of 325 mg daily. That’s a new finding, Dr. Cuzick said.
He noted that the ASPREE study largely consists of patients 70 years of age or older, and the authors “draw some conclusions which we can’t ignore about potential safety.”
One of the safety concerns is the increased risk for gastrointestinal bleeding, which is why Dr. Cuzick and colleagues previously recommended caution in the use of aspirin to prevent cancer in elderly patients. The group published a study in 2015 that suggested a benefit of taking aspirin daily for 5-10 years in patients aged 50-65 years, but the risk/benefit ratio was unclear for patients 70 years and older.
The ASPREE data now add to those uncertainties and suggest “there may be some side effects that we do not understand,” Dr. Cuzick said.
“I’m still optimistic that aspirin is going to be important for cancer prevention, but probably focusing on ages 50-70,” he added. “[The ASPREE data] reinforce the caution that we have to take in terms of trying to understand what the side effects are and what’s going on at these older ages.”
Dr. Cuzick is currently leading the AsCaP Project, an international effort to better understand why aspirin might work in preventing some cancer types but not others. AsCaP is supported by Cancer Research UK and also includes Dr. Chan among the researchers attempting to find out which patients may benefit the most from aspirin and which may be at greater risk of adverse effects.
The ASPREE trial was funded by grants from the National Institute on Aging, the National Cancer Institute, the National Health and Medical Research Council of Australia, Monash University, and the Victorian Cancer Agency. Several ASPREE investigators disclosed financial relationships with Bayer Pharma. The editorialists had no conflicts of interest. Dr. Cuzick has been an advisory board member for Bayer in the past.
SOURCE: McNeil J et al. J Natl Cancer Inst. 2020 Aug 11. doi: 10.1093/jnci/djaa114.
Aspirin may accelerate the progression of advanced cancers and lead to an earlier death as a result, new data from the ASPREE study suggest.
The results showed that patients 65 years and older who started taking daily low-dose aspirin had a 19% higher chance of being diagnosed with metastatic cancer, a 22% higher chance of being diagnosed with a stage 4 tumor, and a 31% increased risk of death from stage 4 cancer, when compared with patients who took a placebo.
John J. McNeil, MBBS, PhD, of Monash University in Melbourne, Australia, and colleagues detailed these findings in the Journal of the National Cancer Institute.
“If confirmed, the clinical implications of these findings could be important for the use of aspirin in an older population,” the authors wrote.
When results of the ASPREE study were first reported in 2018, they “raised important concerns,” Ernest Hawk, MD, and Karen Colbert Maresso wrote in an editorial related to the current publication.
“Unlike ARRIVE, ASCEND, and nearly all prior primary prevention CVD [cardiovascular disease] trials of aspirin, ASPREE surprisingly demonstrated increased all-cause mortality in the aspirin group, which appeared to be driven largely by an increase in cancer-related deaths,” wrote the editorialists, who are both from the University of Texas MD Anderson Cancer Center in Houston.
Even though the ASPREE investigators have now taken a deeper dive into their data, the findings “neither explain nor alleviate the concerns raised by the initial ASPREE report,” the editorialists noted.
ASPREE design and results
ASPREE is a multicenter, double-blind trial of 19,114 older adults living in Australia (n = 16,703) or the United States (n = 2,411). Most patients were 70 years or older at baseline. However, the U.S. group also included patients 65 years and older who were racial/ethnic minorities (n = 564).
Patients were randomized to receive 100 mg of enteric-coated aspirin daily (n = 9,525) or matching placebo (n = 9,589) from March 2010 through December 2014.
At inclusion, all participants were free from cardiovascular disease, dementia, or physical disability. A previous history of cancer was not used to exclude participants, and 19.1% of patients had cancer at randomization. Most patients (89%) had not used aspirin regularly before entering the trial.
At a median follow-up of 4.7 years, there were 981 incident cancer events in the aspirin-treated group and 952 in the placebo-treated group, with an overall incident cancer rate of 10.1%.
Of the 1,933 patients with newly diagnosed cancer, 65.7% had a localized cancer, 18.8% had a new metastatic cancer, 5.8% had metastatic disease from an existing cancer, and 9.7% had a new hematologic or lymphatic cancer.
A quarter of cancer patients (n = 495) died as a result of their malignancy, with 52 dying from a cancer they already had at randomization.
Aspirin was not associated with the risk of first incident cancer diagnosis or incident localized cancer diagnosis. The hazard ratios were 1.04 for all incident cancers (95% confidence interval, 0.95-1.14) and 0.99 for incident localized cancers (95% CI, 0.89-1.11).
However, aspirin was associated with an increased risk of metastatic cancer and cancer presenting at stage 4. The HR for metastatic cancer was 1.19 (95% CI, 1.00-1.43), and the HR for newly diagnosed stage 4 cancer was 1.22 (95% CI, 1.02-1.45).
Furthermore, “an increased progression to death was observed amongst those randomized to aspirin, regardless of whether the initial cancer presentation had been localized or metastatic,” the investigators wrote.
The HRs for death were 1.35 for all cancers (95% CI, 1.13-1.61), 1.47 for localized cancers (95% CI, 1.07-2.02), and 1.30 for metastatic cancers (95% CI, 1.03-1.63).
“Deaths were particularly high among those on aspirin who were diagnosed with advanced solid cancers,” study author Andrew Chan, MD, of Massachusetts General Hospital in Boston, said in a press statement.
Indeed, HRs for death in patients with solid tumors presenting at stage 3 and 4 were a respective 2.11 (95% CI, 1.03-4.33) and 1.31 (95% CI, 1.04-1.64). This suggests a possible adverse effect of aspirin on the growth of cancers once they have already developed in older adults, Dr. Chan said.
Where does that leave aspirin for cancer prevention?
“Although these results suggest that we should be cautious about starting aspirin therapy in otherwise healthy older adults, this does not mean that individuals who are already taking aspirin – particularly if they began taking it at a younger age – should stop their aspirin regimen,” Dr. Chan said.
There are decades of data supporting the use of daily aspirin to prevent multiple cancer types, particularly colorectal cancer, in individuals under the age of 70 years. In a recent meta-analysis, for example, regular aspirin use was linked to a 27% reduced risk for colorectal cancer, a 33% reduced risk for squamous cell esophageal cancer, a 39% decreased risk for adenocarcinoma of the esophagus and gastric cardia, a 36% decreased risk for stomach cancer, a 38% decreased risk for hepatobiliary tract cancer, and a 22% decreased risk for pancreatic cancer.
While these figures are mostly based on observational and case-control studies, it “reaffirms the fact that, overall, when you look at all of the ages, that there is still a benefit of aspirin for cancer,” John Cuzick, PhD, of Queen Mary University of London (England), said in an interview.
In fact, the meta-analysis goes as far as suggesting that perhaps the dose of aspirin being used is too low, with the authors noting that there was a 35% risk reduction in colorectal cancer with a dose of 325 mg daily. That’s a new finding, Dr. Cuzick said.
He noted that the ASPREE study largely consists of patients 70 years of age or older, and the authors “draw some conclusions which we can’t ignore about potential safety.”
One of the safety concerns is the increased risk for gastrointestinal bleeding, which is why Dr. Cuzick and colleagues previously recommended caution in the use of aspirin to prevent cancer in elderly patients. The group published a study in 2015 that suggested a benefit of taking aspirin daily for 5-10 years in patients aged 50-65 years, but the risk/benefit ratio was unclear for patients 70 years and older.
The ASPREE data now add to those uncertainties and suggest “there may be some side effects that we do not understand,” Dr. Cuzick said.
“I’m still optimistic that aspirin is going to be important for cancer prevention, but probably focusing on ages 50-70,” he added. “[The ASPREE data] reinforce the caution that we have to take in terms of trying to understand what the side effects are and what’s going on at these older ages.”
Dr. Cuzick is currently leading the AsCaP Project, an international effort to better understand why aspirin might work in preventing some cancer types but not others. AsCaP is supported by Cancer Research UK and also includes Dr. Chan among the researchers attempting to find out which patients may benefit the most from aspirin and which may be at greater risk of adverse effects.
The ASPREE trial was funded by grants from the National Institute on Aging, the National Cancer Institute, the National Health and Medical Research Council of Australia, Monash University, and the Victorian Cancer Agency. Several ASPREE investigators disclosed financial relationships with Bayer Pharma. The editorialists had no conflicts of interest. Dr. Cuzick has been an advisory board member for Bayer in the past.
SOURCE: McNeil J et al. J Natl Cancer Inst. 2020 Aug 11. doi: 10.1093/jnci/djaa114.
FROM JOURNAL OF THE NATIONAL CANCER INSTITUTE
Continued extension of time for thrombolysis in stroke
Background: Current guidelines for ischemic stroke recommend the time to thrombolysis be within 4.5 hours after onset of stroke. Guidelines are based on noncontrasted CT, but CT perfusion and perfusion-diffusion MRI may show salvageable brain tissue beyond the 4.5 hours. Studies have shown better outcomes in patients who were chosen for reperfusion based on tissue viability rather than time from onset of stroke. This has resulted in a disparity between the time windows used for thrombolysis.
Study design: Multicenter, randomized, placebo-controlled trial.
Setting: Hospitalized patients with acute ischemic stroke from 16 centers in Australia, 10 centers in Taiwan, 1 center in New Zealand, and 1 center in Finland.
Synopsis: 225 patients (aged 18 years and older) with acute ischemic stroke with hypoperfused but salvageable areas of brain detected on CT perfusion imaging or perfusion-diffusion MRI were randomly assigned to receive IV alteplase or placebo between 4.5 and 9 hours after onset of stroke or on awakening with stroke. Primary outcome measured on modified Rankin scale was 0 (no neurologic deficit) or 1. Before the trial was fully enrolled, it was terminated because of a loss of equipoise based on positive results from a previous trial. Of the patients enrolled, the primary outcome occurred in 35.4% of the alteplase group and 29.5% in the placebo group (adjusted risk ratio, 1.44). Symptomatic intracerebral hemorrhage was experienced in 6.2% of the patients in the alteplase group and 0.9% of patients in the placebo group (adjusted risk ratio, 7.22).
Not all centers may have access to perfusion imaging, so the study’s findings may not be applicable to multiple sites.
Bottom line: Diffusion-perfusion imaging may be useful in determining salvageable brain tissue in acute ischemic stroke that may benefit from thrombolysis after the standard 4.5-hour window, but further studies need to be conducted before guidelines are changed.
Citation: Ma H et al. Thrombolysis guided by perfusion imaging up to 9 hours after onset of stroke. N Engl J Med. 2019;380(19):1795-803.
Dr. Rogers is a hospitalist at Ochsner Health System, New Orleans.
Background: Current guidelines for ischemic stroke recommend the time to thrombolysis be within 4.5 hours after onset of stroke. Guidelines are based on noncontrasted CT, but CT perfusion and perfusion-diffusion MRI may show salvageable brain tissue beyond the 4.5 hours. Studies have shown better outcomes in patients who were chosen for reperfusion based on tissue viability rather than time from onset of stroke. This has resulted in a disparity between the time windows used for thrombolysis.
Study design: Multicenter, randomized, placebo-controlled trial.
Setting: Hospitalized patients with acute ischemic stroke from 16 centers in Australia, 10 centers in Taiwan, 1 center in New Zealand, and 1 center in Finland.
Synopsis: 225 patients (aged 18 years and older) with acute ischemic stroke with hypoperfused but salvageable areas of brain detected on CT perfusion imaging or perfusion-diffusion MRI were randomly assigned to receive IV alteplase or placebo between 4.5 and 9 hours after onset of stroke or on awakening with stroke. Primary outcome measured on modified Rankin scale was 0 (no neurologic deficit) or 1. Before the trial was fully enrolled, it was terminated because of a loss of equipoise based on positive results from a previous trial. Of the patients enrolled, the primary outcome occurred in 35.4% of the alteplase group and 29.5% in the placebo group (adjusted risk ratio, 1.44). Symptomatic intracerebral hemorrhage was experienced in 6.2% of the patients in the alteplase group and 0.9% of patients in the placebo group (adjusted risk ratio, 7.22).
Not all centers may have access to perfusion imaging, so the study’s findings may not be applicable to multiple sites.
Bottom line: Diffusion-perfusion imaging may be useful in determining salvageable brain tissue in acute ischemic stroke that may benefit from thrombolysis after the standard 4.5-hour window, but further studies need to be conducted before guidelines are changed.
Citation: Ma H et al. Thrombolysis guided by perfusion imaging up to 9 hours after onset of stroke. N Engl J Med. 2019;380(19):1795-803.
Dr. Rogers is a hospitalist at Ochsner Health System, New Orleans.
Background: Current guidelines for ischemic stroke recommend the time to thrombolysis be within 4.5 hours after onset of stroke. Guidelines are based on noncontrasted CT, but CT perfusion and perfusion-diffusion MRI may show salvageable brain tissue beyond the 4.5 hours. Studies have shown better outcomes in patients who were chosen for reperfusion based on tissue viability rather than time from onset of stroke. This has resulted in a disparity between the time windows used for thrombolysis.
Study design: Multicenter, randomized, placebo-controlled trial.
Setting: Hospitalized patients with acute ischemic stroke from 16 centers in Australia, 10 centers in Taiwan, 1 center in New Zealand, and 1 center in Finland.
Synopsis: 225 patients (aged 18 years and older) with acute ischemic stroke with hypoperfused but salvageable areas of brain detected on CT perfusion imaging or perfusion-diffusion MRI were randomly assigned to receive IV alteplase or placebo between 4.5 and 9 hours after onset of stroke or on awakening with stroke. Primary outcome measured on modified Rankin scale was 0 (no neurologic deficit) or 1. Before the trial was fully enrolled, it was terminated because of a loss of equipoise based on positive results from a previous trial. Of the patients enrolled, the primary outcome occurred in 35.4% of the alteplase group and 29.5% in the placebo group (adjusted risk ratio, 1.44). Symptomatic intracerebral hemorrhage was experienced in 6.2% of the patients in the alteplase group and 0.9% of patients in the placebo group (adjusted risk ratio, 7.22).
Not all centers may have access to perfusion imaging, so the study’s findings may not be applicable to multiple sites.
Bottom line: Diffusion-perfusion imaging may be useful in determining salvageable brain tissue in acute ischemic stroke that may benefit from thrombolysis after the standard 4.5-hour window, but further studies need to be conducted before guidelines are changed.
Citation: Ma H et al. Thrombolysis guided by perfusion imaging up to 9 hours after onset of stroke. N Engl J Med. 2019;380(19):1795-803.
Dr. Rogers is a hospitalist at Ochsner Health System, New Orleans.
HM20 Virtual Product Theater: Aug. 12
Aug. 12, 2020. 12:00 p.m. to 1:00 p.m. ET
Clinical Insights in VTE: Treatment and Risk Reduction Through Prophylaxis
Speaker: Michael S. Oleksyk, MD, FACP, CPE, CMPE
Clinical assistant professor, Florida State University, Pensacola
Hospitalist & palliative care physician, Baptist Hospital, Pensacola.
Program description:
This lecture will discuss venous thromboembolism prophylaxis, as well as treatment options for patients with deep vein thrombosis and/or pulmonary embolism, and how these treatment options may reduce the risk of recurrent thrombotic events.
Sponsored by Janssen Pharmaceuticals Inc.
Aug. 12, 2020. 12:00 p.m. to 1:00 p.m. ET
Clinical Insights in VTE: Treatment and Risk Reduction Through Prophylaxis
Speaker: Michael S. Oleksyk, MD, FACP, CPE, CMPE
Clinical assistant professor, Florida State University, Pensacola
Hospitalist & palliative care physician, Baptist Hospital, Pensacola.
Program description:
This lecture will discuss venous thromboembolism prophylaxis, as well as treatment options for patients with deep vein thrombosis and/or pulmonary embolism, and how these treatment options may reduce the risk of recurrent thrombotic events.
Sponsored by Janssen Pharmaceuticals Inc.
Aug. 12, 2020. 12:00 p.m. to 1:00 p.m. ET
Clinical Insights in VTE: Treatment and Risk Reduction Through Prophylaxis
Speaker: Michael S. Oleksyk, MD, FACP, CPE, CMPE
Clinical assistant professor, Florida State University, Pensacola
Hospitalist & palliative care physician, Baptist Hospital, Pensacola.
Program description:
This lecture will discuss venous thromboembolism prophylaxis, as well as treatment options for patients with deep vein thrombosis and/or pulmonary embolism, and how these treatment options may reduce the risk of recurrent thrombotic events.
Sponsored by Janssen Pharmaceuticals Inc.
Patent foramen ovale linked with increased risk of ischemic stroke in PE
Background: Studies have demonstrated the increased risk for ischemic stroke in patients diagnosed with acute PE, and data support the mechanism of paradoxical embolism via PFO. However, the frequency of this phenomenon is unknown and the strength of the association between PFO and ischemic stroke in patients with PE is unclear.
Study design: Prospective cohort study.
Setting: Four French hospitals.
Synopsis: 315 patients aged 18 years and older presenting with acute symptomatic PE were evaluated at the time of diagnosis for PFO with contrast transthoracic echocardiography and for ischemic stroke with cerebral magnetic resonance imaging. The overall frequency of ischemic stroke at the time of PE diagnosis was high (7.6%), and was nearly four times higher in the PFO group than the non-PFO group (21.4% vs. 5.5%; difference in proportions, 15.9 percentage points; 95% confidence interval, 4.7-30.7).
This study adds to the growing body of data which supports the association of ischemic stroke with PFO and PE. Given the moderate indication for indefinite anticoagulation in patients at high risk for recurrent PE and stroke, there may be a role for screening for PFO in patients with acute PE so that they can be appropriately risk stratified.
Bottom line: The presence of ischemic stroke in patients with acute pulmonary embolism is high, and there is a strong association with PFO.
Citation: Le Moigne E et al. Patent Foramen Ovale and Ischemic Stroke in Patients With Pulmonary Embolism: A Prospective Cohort Study. Ann Intern Med. 2019;170:756-63.
Dr. McIntyre is a hospitalist at Ochsner Health System, New Orleans.
Background: Studies have demonstrated the increased risk for ischemic stroke in patients diagnosed with acute PE, and data support the mechanism of paradoxical embolism via PFO. However, the frequency of this phenomenon is unknown and the strength of the association between PFO and ischemic stroke in patients with PE is unclear.
Study design: Prospective cohort study.
Setting: Four French hospitals.
Synopsis: 315 patients aged 18 years and older presenting with acute symptomatic PE were evaluated at the time of diagnosis for PFO with contrast transthoracic echocardiography and for ischemic stroke with cerebral magnetic resonance imaging. The overall frequency of ischemic stroke at the time of PE diagnosis was high (7.6%), and was nearly four times higher in the PFO group than the non-PFO group (21.4% vs. 5.5%; difference in proportions, 15.9 percentage points; 95% confidence interval, 4.7-30.7).
This study adds to the growing body of data which supports the association of ischemic stroke with PFO and PE. Given the moderate indication for indefinite anticoagulation in patients at high risk for recurrent PE and stroke, there may be a role for screening for PFO in patients with acute PE so that they can be appropriately risk stratified.
Bottom line: The presence of ischemic stroke in patients with acute pulmonary embolism is high, and there is a strong association with PFO.
Citation: Le Moigne E et al. Patent Foramen Ovale and Ischemic Stroke in Patients With Pulmonary Embolism: A Prospective Cohort Study. Ann Intern Med. 2019;170:756-63.
Dr. McIntyre is a hospitalist at Ochsner Health System, New Orleans.
Background: Studies have demonstrated the increased risk for ischemic stroke in patients diagnosed with acute PE, and data support the mechanism of paradoxical embolism via PFO. However, the frequency of this phenomenon is unknown and the strength of the association between PFO and ischemic stroke in patients with PE is unclear.
Study design: Prospective cohort study.
Setting: Four French hospitals.
Synopsis: 315 patients aged 18 years and older presenting with acute symptomatic PE were evaluated at the time of diagnosis for PFO with contrast transthoracic echocardiography and for ischemic stroke with cerebral magnetic resonance imaging. The overall frequency of ischemic stroke at the time of PE diagnosis was high (7.6%), and was nearly four times higher in the PFO group than the non-PFO group (21.4% vs. 5.5%; difference in proportions, 15.9 percentage points; 95% confidence interval, 4.7-30.7).
This study adds to the growing body of data which supports the association of ischemic stroke with PFO and PE. Given the moderate indication for indefinite anticoagulation in patients at high risk for recurrent PE and stroke, there may be a role for screening for PFO in patients with acute PE so that they can be appropriately risk stratified.
Bottom line: The presence of ischemic stroke in patients with acute pulmonary embolism is high, and there is a strong association with PFO.
Citation: Le Moigne E et al. Patent Foramen Ovale and Ischemic Stroke in Patients With Pulmonary Embolism: A Prospective Cohort Study. Ann Intern Med. 2019;170:756-63.
Dr. McIntyre is a hospitalist at Ochsner Health System, New Orleans.
No rise in major hemorrhagic events with antiplatelet therapy after ICH
Background: Antiplatelet agents reduce the risk of major vascular events in patient with established vaso-occlusive disease, but they may increase the risk of ICH. Patients with prior ICH are at risk for both vaso-occlusive and hemorrhagic events. Clarification of the relative risk and benefit of antiplatelet agent use in this clinical scenario would serve to guide therapy.
Study design: Prospective, open-label, randomized parallel group trial.
Setting: 122 hospitals located in the United Kingdom.
Synopsis: The study included 537 adult patients with imaging-confirmed, nontraumatic intracerebral hemorrhage who were previously prescribed antithrombotic medications were randomized in 1:1 fashion to either start or avoid antiplatelet therapy. Participants were followed up on an annual basis with postal questionnaires both to the participants and their primary care providers. No significant difference was identified in rates of recurrent ICH (adjusted hazard ratio, 0.51; 95% confidence interval, 0.25-1.03), major hemorrhagic events (aHR, 0.71; 95% CI, 0.39-1.30), or major occlusive vascular events (aHR, 1.02; 95% CI, 0.65-1.60) between groups.
Hospitalists should be aware that these data suggest that the risk assessment for resumption of antiplatelet agents should not be affected by a history of nontraumatic intracerebral hemorrhage when weighed against the benefit of these medications in patients with occlusive vascular disease.
Bottom line: Resumption of antiplatelet agents following intracerebral hemorrhage showed no evidence of increased risk of recurrent intracerebral hemorrhage or major hemorrhagic events.
Citation: RESTART Collaboration. Effects of antiplatelet therapy after stroke due to intracerebral haemorrhage (RESTART): A randomized, open-label trial. Lancet. 2019. doi: 10.1016/S0140-6736(19)30840-2.
Dr. Deitelzweig is system department chair of hospital medicine at Ochsner Health System, New Orleans.
Background: Antiplatelet agents reduce the risk of major vascular events in patient with established vaso-occlusive disease, but they may increase the risk of ICH. Patients with prior ICH are at risk for both vaso-occlusive and hemorrhagic events. Clarification of the relative risk and benefit of antiplatelet agent use in this clinical scenario would serve to guide therapy.
Study design: Prospective, open-label, randomized parallel group trial.
Setting: 122 hospitals located in the United Kingdom.
Synopsis: The study included 537 adult patients with imaging-confirmed, nontraumatic intracerebral hemorrhage who were previously prescribed antithrombotic medications were randomized in 1:1 fashion to either start or avoid antiplatelet therapy. Participants were followed up on an annual basis with postal questionnaires both to the participants and their primary care providers. No significant difference was identified in rates of recurrent ICH (adjusted hazard ratio, 0.51; 95% confidence interval, 0.25-1.03), major hemorrhagic events (aHR, 0.71; 95% CI, 0.39-1.30), or major occlusive vascular events (aHR, 1.02; 95% CI, 0.65-1.60) between groups.
Hospitalists should be aware that these data suggest that the risk assessment for resumption of antiplatelet agents should not be affected by a history of nontraumatic intracerebral hemorrhage when weighed against the benefit of these medications in patients with occlusive vascular disease.
Bottom line: Resumption of antiplatelet agents following intracerebral hemorrhage showed no evidence of increased risk of recurrent intracerebral hemorrhage or major hemorrhagic events.
Citation: RESTART Collaboration. Effects of antiplatelet therapy after stroke due to intracerebral haemorrhage (RESTART): A randomized, open-label trial. Lancet. 2019. doi: 10.1016/S0140-6736(19)30840-2.
Dr. Deitelzweig is system department chair of hospital medicine at Ochsner Health System, New Orleans.
Background: Antiplatelet agents reduce the risk of major vascular events in patient with established vaso-occlusive disease, but they may increase the risk of ICH. Patients with prior ICH are at risk for both vaso-occlusive and hemorrhagic events. Clarification of the relative risk and benefit of antiplatelet agent use in this clinical scenario would serve to guide therapy.
Study design: Prospective, open-label, randomized parallel group trial.
Setting: 122 hospitals located in the United Kingdom.
Synopsis: The study included 537 adult patients with imaging-confirmed, nontraumatic intracerebral hemorrhage who were previously prescribed antithrombotic medications were randomized in 1:1 fashion to either start or avoid antiplatelet therapy. Participants were followed up on an annual basis with postal questionnaires both to the participants and their primary care providers. No significant difference was identified in rates of recurrent ICH (adjusted hazard ratio, 0.51; 95% confidence interval, 0.25-1.03), major hemorrhagic events (aHR, 0.71; 95% CI, 0.39-1.30), or major occlusive vascular events (aHR, 1.02; 95% CI, 0.65-1.60) between groups.
Hospitalists should be aware that these data suggest that the risk assessment for resumption of antiplatelet agents should not be affected by a history of nontraumatic intracerebral hemorrhage when weighed against the benefit of these medications in patients with occlusive vascular disease.
Bottom line: Resumption of antiplatelet agents following intracerebral hemorrhage showed no evidence of increased risk of recurrent intracerebral hemorrhage or major hemorrhagic events.
Citation: RESTART Collaboration. Effects of antiplatelet therapy after stroke due to intracerebral haemorrhage (RESTART): A randomized, open-label trial. Lancet. 2019. doi: 10.1016/S0140-6736(19)30840-2.
Dr. Deitelzweig is system department chair of hospital medicine at Ochsner Health System, New Orleans.
Hematologic manifestations of COVID-19
While SARS-CoV-2 causes frequent and potentially severe pulmonary disease, extrapulmonary manifestations may be a prominent part of the clinical spectrum, according to a review published in Nature Medicine.
In this comprehensive literature review, Aakriti Gupta, MD, of New York-Presbyterian/Columbia University Irving Medical Center and colleagues detailed the epidemiologic and clinical multisystem effects of COVID-19. The authors explained what is known and/or suspected about the pathophysiology of those effects and outlined the resultant management considerations.
Key mechanisms for multiorgan injury include direct viral toxicity, endothelial cell damage with inflammatory mediation of thrombosis, aberrant immune response, and dysregulation of the renin-angiotensin-aldosterone system.
The relative importance of each pathway in the clinical presentation of COVID-19 and the mechanism for extrapulmonary spread of SARS-CoV-2 infection are imperfectly understood, Dr. Gupta and colleagues noted.
As for the hematologic effects of COVID-19, patients may present with several laboratory abnormalities, but the most clinically relevant complications are thromboembolic.
COVID-19-associated coagulopathy
Dr. Gupta and colleagues noted that COVID-19–associated coagulopathy (CAC) is accompanied by elevated levels of D-dimer and fibrinogen, with minor abnormalities in prothrombin time, activated partial thromboplastin time, and platelet counts in the initial stage of infection.
Elevated D-dimer levels have been reported in up to 46% of hospitalized patients, and a longitudinal increase while hospitalized is associated with higher mortality.
In initial reports from China and the Netherlands, thrombotic complications were seen in up to 30% of COVID-19 patients in ICUs. Thromboembolic events have been reported in 17%-22% of critically ill COVID-19 patients in studies from Italy and France.
Globally, in severely affected COVID-19 patients, there have been reports of thromboses in intravenous catheters and extracorporeal circuits as well as arterial vascular occlusive events, including myocardial infarction, acute limb ischemia, and stroke.
There have been multiple small studies in which critically ill COVID-19 patients were routinely screened for thrombotic disease. In these studies, rates of thrombotic complications ranged from 69% to 85%, despite thromboprophylaxis. Variability in prophylactic and screening protocols explain discrepancies in event rates.
Pathophysiology
The abnormally high blood levels of D-dimer and fibrinogen during the early stages of SARS-CoV-2 infection are reflective of excessive inflammation rather than overt disseminated intravascular coagulation (DIC), which may develop in later stages of illness, according to Dr. Gupta and colleagues. The authors theorized that uninhibited inflammation, along with hypoxia and direct viral-mediated cellular injury, contribute to thrombotic complications in COVID-19 patients.
“The increased expression of ACE2 in endothelial cells after infection with SARS-CoV-2 may perpetuate a vicious cycle of endothelialitis that promotes thromboinflammation,” the authors wrote. “Collectively, hemostatic and inflammatory changes, which reflect endothelial damage and activation as well as critical illness, constitute a prothrombotic milieu.”
The authors noted that small autopsy series have shown high rates of microvascular and macrovascular thromboses, particularly in the pulmonary circulation, in COVID-19 patients.
Management considerations
Dr. Gupta and colleagues referenced interim guidelines from the International Society of Thrombosis and Haemostasis that recommend serial complete blood counts, with white blood cell differential and assessment of D-dimer, prothrombin time, and fibrinogen for hospitalized patients with COVID-19. The authors also cited guidelines published in the Journal of the American College of Cardiology that recommend routine risk assessment for venous thromboembolism in all hospitalized patients with COVID-19 and the consideration of standard-dose pharmaco-prophylaxis in patients who lack absolute contraindications.
Empiric use of higher-than-routine prophylactic-dose or therapeutic-dose anticoagulation in ICU patients in the absence of proven thromboses has been implemented in some institutions, Dr. Gupta and colleagues noted. Parenteral anticoagulants (such as low-molecular-weight or unfractionated heparin) are preferred to oral anticoagulants because of short half-life, available reversal agents, and the potential for drug interactions between oral agents and antiviral and/or antibacterial treatment, according to the authors.
They wrote that randomized clinical trials “will be crucial to establishing effective and safe strategies” for anticoagulation in COVID-19 patients. To this point, few randomized trials have been published to guide management of COVID-19–associated extrapulmonary manifestations, including CAC.
Research priorities
A more complete understanding of the organ-specific pathophysiology of this multisystem disease is vital, according to Dr. Gupta and colleagues.
“Regional, national, and international collaborations of clinicians and scientists focused on high-quality, transparent, ethical, and evidence-based research practices would help propel the global community toward achieving success against this pandemic,” the authors wrote.
They noted that common definitions and data standards for research are key for cross-institutional and international collaborations.
Initial attention to high-quality prospective scientific documentation standards would have been valuable and will be required for dedicated trials to address the multisystem effects of COVID-19.
Community of learners
As much as at any prior time in their careers, during the COVID-19 pandemic, health care providers have been enveloped in a community of learners – a group of people who share values and beliefs and who actively engage in learning from one another.
Through a patchwork of sources – news media, social media, traditional medical journals, general and COVID-focused meetings, and, most importantly, patients – we have been living in a learning-centered environment. Academicians, clinicians, practicing physicians, researchers, patients, family members, and caregivers have been actively and intentionally building a knowledge base together.
Through their published review, Dr. Gupta and colleagues have contributed meaningfully to the understanding our learning community has of the various extrapulmonary manifestations of COVID-19. The authors have provided a nice template for further research and clinical advances.
Dr. Gupta and colleagues disclosed financial relationships with a range of pharmaceutical companies and other organizations.
Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.
Source: Gupta A et al. Nat Med. 2020 Jul;26(7):1017-32.
While SARS-CoV-2 causes frequent and potentially severe pulmonary disease, extrapulmonary manifestations may be a prominent part of the clinical spectrum, according to a review published in Nature Medicine.
In this comprehensive literature review, Aakriti Gupta, MD, of New York-Presbyterian/Columbia University Irving Medical Center and colleagues detailed the epidemiologic and clinical multisystem effects of COVID-19. The authors explained what is known and/or suspected about the pathophysiology of those effects and outlined the resultant management considerations.
Key mechanisms for multiorgan injury include direct viral toxicity, endothelial cell damage with inflammatory mediation of thrombosis, aberrant immune response, and dysregulation of the renin-angiotensin-aldosterone system.
The relative importance of each pathway in the clinical presentation of COVID-19 and the mechanism for extrapulmonary spread of SARS-CoV-2 infection are imperfectly understood, Dr. Gupta and colleagues noted.
As for the hematologic effects of COVID-19, patients may present with several laboratory abnormalities, but the most clinically relevant complications are thromboembolic.
COVID-19-associated coagulopathy
Dr. Gupta and colleagues noted that COVID-19–associated coagulopathy (CAC) is accompanied by elevated levels of D-dimer and fibrinogen, with minor abnormalities in prothrombin time, activated partial thromboplastin time, and platelet counts in the initial stage of infection.
Elevated D-dimer levels have been reported in up to 46% of hospitalized patients, and a longitudinal increase while hospitalized is associated with higher mortality.
In initial reports from China and the Netherlands, thrombotic complications were seen in up to 30% of COVID-19 patients in ICUs. Thromboembolic events have been reported in 17%-22% of critically ill COVID-19 patients in studies from Italy and France.
Globally, in severely affected COVID-19 patients, there have been reports of thromboses in intravenous catheters and extracorporeal circuits as well as arterial vascular occlusive events, including myocardial infarction, acute limb ischemia, and stroke.
There have been multiple small studies in which critically ill COVID-19 patients were routinely screened for thrombotic disease. In these studies, rates of thrombotic complications ranged from 69% to 85%, despite thromboprophylaxis. Variability in prophylactic and screening protocols explain discrepancies in event rates.
Pathophysiology
The abnormally high blood levels of D-dimer and fibrinogen during the early stages of SARS-CoV-2 infection are reflective of excessive inflammation rather than overt disseminated intravascular coagulation (DIC), which may develop in later stages of illness, according to Dr. Gupta and colleagues. The authors theorized that uninhibited inflammation, along with hypoxia and direct viral-mediated cellular injury, contribute to thrombotic complications in COVID-19 patients.
“The increased expression of ACE2 in endothelial cells after infection with SARS-CoV-2 may perpetuate a vicious cycle of endothelialitis that promotes thromboinflammation,” the authors wrote. “Collectively, hemostatic and inflammatory changes, which reflect endothelial damage and activation as well as critical illness, constitute a prothrombotic milieu.”
The authors noted that small autopsy series have shown high rates of microvascular and macrovascular thromboses, particularly in the pulmonary circulation, in COVID-19 patients.
Management considerations
Dr. Gupta and colleagues referenced interim guidelines from the International Society of Thrombosis and Haemostasis that recommend serial complete blood counts, with white blood cell differential and assessment of D-dimer, prothrombin time, and fibrinogen for hospitalized patients with COVID-19. The authors also cited guidelines published in the Journal of the American College of Cardiology that recommend routine risk assessment for venous thromboembolism in all hospitalized patients with COVID-19 and the consideration of standard-dose pharmaco-prophylaxis in patients who lack absolute contraindications.
Empiric use of higher-than-routine prophylactic-dose or therapeutic-dose anticoagulation in ICU patients in the absence of proven thromboses has been implemented in some institutions, Dr. Gupta and colleagues noted. Parenteral anticoagulants (such as low-molecular-weight or unfractionated heparin) are preferred to oral anticoagulants because of short half-life, available reversal agents, and the potential for drug interactions between oral agents and antiviral and/or antibacterial treatment, according to the authors.
They wrote that randomized clinical trials “will be crucial to establishing effective and safe strategies” for anticoagulation in COVID-19 patients. To this point, few randomized trials have been published to guide management of COVID-19–associated extrapulmonary manifestations, including CAC.
Research priorities
A more complete understanding of the organ-specific pathophysiology of this multisystem disease is vital, according to Dr. Gupta and colleagues.
“Regional, national, and international collaborations of clinicians and scientists focused on high-quality, transparent, ethical, and evidence-based research practices would help propel the global community toward achieving success against this pandemic,” the authors wrote.
They noted that common definitions and data standards for research are key for cross-institutional and international collaborations.
Initial attention to high-quality prospective scientific documentation standards would have been valuable and will be required for dedicated trials to address the multisystem effects of COVID-19.
Community of learners
As much as at any prior time in their careers, during the COVID-19 pandemic, health care providers have been enveloped in a community of learners – a group of people who share values and beliefs and who actively engage in learning from one another.
Through a patchwork of sources – news media, social media, traditional medical journals, general and COVID-focused meetings, and, most importantly, patients – we have been living in a learning-centered environment. Academicians, clinicians, practicing physicians, researchers, patients, family members, and caregivers have been actively and intentionally building a knowledge base together.
Through their published review, Dr. Gupta and colleagues have contributed meaningfully to the understanding our learning community has of the various extrapulmonary manifestations of COVID-19. The authors have provided a nice template for further research and clinical advances.
Dr. Gupta and colleagues disclosed financial relationships with a range of pharmaceutical companies and other organizations.
Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.
Source: Gupta A et al. Nat Med. 2020 Jul;26(7):1017-32.
While SARS-CoV-2 causes frequent and potentially severe pulmonary disease, extrapulmonary manifestations may be a prominent part of the clinical spectrum, according to a review published in Nature Medicine.
In this comprehensive literature review, Aakriti Gupta, MD, of New York-Presbyterian/Columbia University Irving Medical Center and colleagues detailed the epidemiologic and clinical multisystem effects of COVID-19. The authors explained what is known and/or suspected about the pathophysiology of those effects and outlined the resultant management considerations.
Key mechanisms for multiorgan injury include direct viral toxicity, endothelial cell damage with inflammatory mediation of thrombosis, aberrant immune response, and dysregulation of the renin-angiotensin-aldosterone system.
The relative importance of each pathway in the clinical presentation of COVID-19 and the mechanism for extrapulmonary spread of SARS-CoV-2 infection are imperfectly understood, Dr. Gupta and colleagues noted.
As for the hematologic effects of COVID-19, patients may present with several laboratory abnormalities, but the most clinically relevant complications are thromboembolic.
COVID-19-associated coagulopathy
Dr. Gupta and colleagues noted that COVID-19–associated coagulopathy (CAC) is accompanied by elevated levels of D-dimer and fibrinogen, with minor abnormalities in prothrombin time, activated partial thromboplastin time, and platelet counts in the initial stage of infection.
Elevated D-dimer levels have been reported in up to 46% of hospitalized patients, and a longitudinal increase while hospitalized is associated with higher mortality.
In initial reports from China and the Netherlands, thrombotic complications were seen in up to 30% of COVID-19 patients in ICUs. Thromboembolic events have been reported in 17%-22% of critically ill COVID-19 patients in studies from Italy and France.
Globally, in severely affected COVID-19 patients, there have been reports of thromboses in intravenous catheters and extracorporeal circuits as well as arterial vascular occlusive events, including myocardial infarction, acute limb ischemia, and stroke.
There have been multiple small studies in which critically ill COVID-19 patients were routinely screened for thrombotic disease. In these studies, rates of thrombotic complications ranged from 69% to 85%, despite thromboprophylaxis. Variability in prophylactic and screening protocols explain discrepancies in event rates.
Pathophysiology
The abnormally high blood levels of D-dimer and fibrinogen during the early stages of SARS-CoV-2 infection are reflective of excessive inflammation rather than overt disseminated intravascular coagulation (DIC), which may develop in later stages of illness, according to Dr. Gupta and colleagues. The authors theorized that uninhibited inflammation, along with hypoxia and direct viral-mediated cellular injury, contribute to thrombotic complications in COVID-19 patients.
“The increased expression of ACE2 in endothelial cells after infection with SARS-CoV-2 may perpetuate a vicious cycle of endothelialitis that promotes thromboinflammation,” the authors wrote. “Collectively, hemostatic and inflammatory changes, which reflect endothelial damage and activation as well as critical illness, constitute a prothrombotic milieu.”
The authors noted that small autopsy series have shown high rates of microvascular and macrovascular thromboses, particularly in the pulmonary circulation, in COVID-19 patients.
Management considerations
Dr. Gupta and colleagues referenced interim guidelines from the International Society of Thrombosis and Haemostasis that recommend serial complete blood counts, with white blood cell differential and assessment of D-dimer, prothrombin time, and fibrinogen for hospitalized patients with COVID-19. The authors also cited guidelines published in the Journal of the American College of Cardiology that recommend routine risk assessment for venous thromboembolism in all hospitalized patients with COVID-19 and the consideration of standard-dose pharmaco-prophylaxis in patients who lack absolute contraindications.
Empiric use of higher-than-routine prophylactic-dose or therapeutic-dose anticoagulation in ICU patients in the absence of proven thromboses has been implemented in some institutions, Dr. Gupta and colleagues noted. Parenteral anticoagulants (such as low-molecular-weight or unfractionated heparin) are preferred to oral anticoagulants because of short half-life, available reversal agents, and the potential for drug interactions between oral agents and antiviral and/or antibacterial treatment, according to the authors.
They wrote that randomized clinical trials “will be crucial to establishing effective and safe strategies” for anticoagulation in COVID-19 patients. To this point, few randomized trials have been published to guide management of COVID-19–associated extrapulmonary manifestations, including CAC.
Research priorities
A more complete understanding of the organ-specific pathophysiology of this multisystem disease is vital, according to Dr. Gupta and colleagues.
“Regional, national, and international collaborations of clinicians and scientists focused on high-quality, transparent, ethical, and evidence-based research practices would help propel the global community toward achieving success against this pandemic,” the authors wrote.
They noted that common definitions and data standards for research are key for cross-institutional and international collaborations.
Initial attention to high-quality prospective scientific documentation standards would have been valuable and will be required for dedicated trials to address the multisystem effects of COVID-19.
Community of learners
As much as at any prior time in their careers, during the COVID-19 pandemic, health care providers have been enveloped in a community of learners – a group of people who share values and beliefs and who actively engage in learning from one another.
Through a patchwork of sources – news media, social media, traditional medical journals, general and COVID-focused meetings, and, most importantly, patients – we have been living in a learning-centered environment. Academicians, clinicians, practicing physicians, researchers, patients, family members, and caregivers have been actively and intentionally building a knowledge base together.
Through their published review, Dr. Gupta and colleagues have contributed meaningfully to the understanding our learning community has of the various extrapulmonary manifestations of COVID-19. The authors have provided a nice template for further research and clinical advances.
Dr. Gupta and colleagues disclosed financial relationships with a range of pharmaceutical companies and other organizations.
Dr. Lyss was a community-based medical oncologist and clinical researcher for more than 35 years before his recent retirement. His clinical and research interests were focused on breast and lung cancers as well as expanding clinical trial access to medically underserved populations. He is based in St. Louis. He has no conflicts of interest.
Source: Gupta A et al. Nat Med. 2020 Jul;26(7):1017-32.
FROM NATURE MEDICINE
Low-dose prasugrel preserves efficacy but lowers bleeding in elderly
In elderly or low-weight patients with acute coronary syndrome (ACS), a reduced dose of prasugrel relative to a full-dose of ticagrelor is associated with lower numerical rates of ischemic events and bleeding events, according to a prespecified substudy of the ISAR-REACT 5 trial.
“The present study provides the strongest support for reduced-dose prasugrel as the standard for elderly and low-weight patients with ACS undergoing an invasive treatment strategy,” according to the senior author, Adnan Kastrati, MD, professor of cardiology and head of the Catheterization Laboratory at Deutsches Herzzentrum, Technical University of Munich.
The main results of ISAR-REACT 5, an open-label, head-to-head comparison of prasugrel and ticagrelor in patients with ACS, showed that the risk of the composite primary endpoint of death, myocardial infarction, or stroke 1 year after randomization was significantly higher for those on ticagrelor than prasugrel (hazard ratio, 1.39; P = .006). The bleeding risk on ticagrelor was also higher but not significantly different (5.4% vs. 4.8%; P = .46) (Schüpke S et al. N Engl J Med. 2019 Oct;381:1524-34).
In this substudy newly published in Annals of Internal Medicine, outcomes were compared in the 1,099 patients who were 75 years or older or weighed less than 60 kg. In this group, unlike those younger or weighing more, patients were randomized to receive a reduced maintenance dose of 5 mg of once-daily prasugrel (rather than 10 mg) or full dose ticagrelor (90 mg twice daily).
At 1 year, the low-dose prasugrel strategy relative to ticagrelor was associated with a lower rate of events (12.7% vs. 14.6%) and a lower rate of bleeding (8.1% vs. 10.6%), defined as Bleeding Academic Research Consortium (BARC) type 3-5 events.
Neither the 18% reduction for the efficacy endpoint (HR, 0.82; 95% CI 0.60-1.14) nor the 28% reduction in the bleeding endpoint (HR, 0.72; 95% CI 0.46-1.12) reached significance, but Dr. Kastrati reported that there was a significant “treatment effect-by-study-group interaction” for BARC 1-5 bleeding (P = .004) favoring prasugrel. This supports low-dose prasugrel as a strategy to prevent the excess bleeding risk previously observed with the standard 10-mg dose of prasugrel.
In other words, a reduced dose of prasugrel, compared with the standard dose of ticagrelor, in low-weight and elderly patients “is associated with maintained anti-ischemic efficacy while protecting these patients against the excess risk of bleeding,” he and his coinvestigators concluded.
Low-weight and older patients represented 27% of those enrolled in ISAR-REACT 5. When compared to the study population as a whole, the risk for both ischemic and bleeding events was at least twice as high, the authors of an accompanying editorial observed. They praised this effort to refine the optimal antiplatelet regimen in a very-high-risk ACS population.
“The current analysis suggests that the prasugrel dose reduction regimen for elderly or underweight patients with ACS is effective and safe,” according to the editorial coauthors, David Conen, MD, and P.J. Devereaux, MD, PhD, who are affiliated with the Population Health Research Institute, Hamilton, Ontario.
This substudy was underpowered to show superiority for the efficacy and safety outcomes in elderly and low-weight ACS patients, which makes these results “hypothesis generating,” but the authors believe that they provide the best available evidence for selecting antiplatelet therapy in this challenging subgroup. Although the exclusion of patients at very high risk of bleeding from ISAR-REACT 5 suggest findings might not be relevant to all elderly and low-weight individuals, the investigators believe the data do inform clinical practice.
“Our study is the first head-to-head randomized comparison of the reduced dose of prasugrel against standard dose of ticagrelor in elderly and low-weight patients,” said Dr. Kastrati in an interview. “Specifically designed studies for this subset of patients are very unlikely to be conducted in the future.”
Dr. Kastrati reported no potential conflicts of interest relevant to this study.
SOURCE: Menichelli M et al. Ann Intern Med. 2020 Jul 21. doi: 10.7326/M20-1806.
In elderly or low-weight patients with acute coronary syndrome (ACS), a reduced dose of prasugrel relative to a full-dose of ticagrelor is associated with lower numerical rates of ischemic events and bleeding events, according to a prespecified substudy of the ISAR-REACT 5 trial.
“The present study provides the strongest support for reduced-dose prasugrel as the standard for elderly and low-weight patients with ACS undergoing an invasive treatment strategy,” according to the senior author, Adnan Kastrati, MD, professor of cardiology and head of the Catheterization Laboratory at Deutsches Herzzentrum, Technical University of Munich.
The main results of ISAR-REACT 5, an open-label, head-to-head comparison of prasugrel and ticagrelor in patients with ACS, showed that the risk of the composite primary endpoint of death, myocardial infarction, or stroke 1 year after randomization was significantly higher for those on ticagrelor than prasugrel (hazard ratio, 1.39; P = .006). The bleeding risk on ticagrelor was also higher but not significantly different (5.4% vs. 4.8%; P = .46) (Schüpke S et al. N Engl J Med. 2019 Oct;381:1524-34).
In this substudy newly published in Annals of Internal Medicine, outcomes were compared in the 1,099 patients who were 75 years or older or weighed less than 60 kg. In this group, unlike those younger or weighing more, patients were randomized to receive a reduced maintenance dose of 5 mg of once-daily prasugrel (rather than 10 mg) or full dose ticagrelor (90 mg twice daily).
At 1 year, the low-dose prasugrel strategy relative to ticagrelor was associated with a lower rate of events (12.7% vs. 14.6%) and a lower rate of bleeding (8.1% vs. 10.6%), defined as Bleeding Academic Research Consortium (BARC) type 3-5 events.
Neither the 18% reduction for the efficacy endpoint (HR, 0.82; 95% CI 0.60-1.14) nor the 28% reduction in the bleeding endpoint (HR, 0.72; 95% CI 0.46-1.12) reached significance, but Dr. Kastrati reported that there was a significant “treatment effect-by-study-group interaction” for BARC 1-5 bleeding (P = .004) favoring prasugrel. This supports low-dose prasugrel as a strategy to prevent the excess bleeding risk previously observed with the standard 10-mg dose of prasugrel.
In other words, a reduced dose of prasugrel, compared with the standard dose of ticagrelor, in low-weight and elderly patients “is associated with maintained anti-ischemic efficacy while protecting these patients against the excess risk of bleeding,” he and his coinvestigators concluded.
Low-weight and older patients represented 27% of those enrolled in ISAR-REACT 5. When compared to the study population as a whole, the risk for both ischemic and bleeding events was at least twice as high, the authors of an accompanying editorial observed. They praised this effort to refine the optimal antiplatelet regimen in a very-high-risk ACS population.
“The current analysis suggests that the prasugrel dose reduction regimen for elderly or underweight patients with ACS is effective and safe,” according to the editorial coauthors, David Conen, MD, and P.J. Devereaux, MD, PhD, who are affiliated with the Population Health Research Institute, Hamilton, Ontario.
This substudy was underpowered to show superiority for the efficacy and safety outcomes in elderly and low-weight ACS patients, which makes these results “hypothesis generating,” but the authors believe that they provide the best available evidence for selecting antiplatelet therapy in this challenging subgroup. Although the exclusion of patients at very high risk of bleeding from ISAR-REACT 5 suggest findings might not be relevant to all elderly and low-weight individuals, the investigators believe the data do inform clinical practice.
“Our study is the first head-to-head randomized comparison of the reduced dose of prasugrel against standard dose of ticagrelor in elderly and low-weight patients,” said Dr. Kastrati in an interview. “Specifically designed studies for this subset of patients are very unlikely to be conducted in the future.”
Dr. Kastrati reported no potential conflicts of interest relevant to this study.
SOURCE: Menichelli M et al. Ann Intern Med. 2020 Jul 21. doi: 10.7326/M20-1806.
In elderly or low-weight patients with acute coronary syndrome (ACS), a reduced dose of prasugrel relative to a full-dose of ticagrelor is associated with lower numerical rates of ischemic events and bleeding events, according to a prespecified substudy of the ISAR-REACT 5 trial.
“The present study provides the strongest support for reduced-dose prasugrel as the standard for elderly and low-weight patients with ACS undergoing an invasive treatment strategy,” according to the senior author, Adnan Kastrati, MD, professor of cardiology and head of the Catheterization Laboratory at Deutsches Herzzentrum, Technical University of Munich.
The main results of ISAR-REACT 5, an open-label, head-to-head comparison of prasugrel and ticagrelor in patients with ACS, showed that the risk of the composite primary endpoint of death, myocardial infarction, or stroke 1 year after randomization was significantly higher for those on ticagrelor than prasugrel (hazard ratio, 1.39; P = .006). The bleeding risk on ticagrelor was also higher but not significantly different (5.4% vs. 4.8%; P = .46) (Schüpke S et al. N Engl J Med. 2019 Oct;381:1524-34).
In this substudy newly published in Annals of Internal Medicine, outcomes were compared in the 1,099 patients who were 75 years or older or weighed less than 60 kg. In this group, unlike those younger or weighing more, patients were randomized to receive a reduced maintenance dose of 5 mg of once-daily prasugrel (rather than 10 mg) or full dose ticagrelor (90 mg twice daily).
At 1 year, the low-dose prasugrel strategy relative to ticagrelor was associated with a lower rate of events (12.7% vs. 14.6%) and a lower rate of bleeding (8.1% vs. 10.6%), defined as Bleeding Academic Research Consortium (BARC) type 3-5 events.
Neither the 18% reduction for the efficacy endpoint (HR, 0.82; 95% CI 0.60-1.14) nor the 28% reduction in the bleeding endpoint (HR, 0.72; 95% CI 0.46-1.12) reached significance, but Dr. Kastrati reported that there was a significant “treatment effect-by-study-group interaction” for BARC 1-5 bleeding (P = .004) favoring prasugrel. This supports low-dose prasugrel as a strategy to prevent the excess bleeding risk previously observed with the standard 10-mg dose of prasugrel.
In other words, a reduced dose of prasugrel, compared with the standard dose of ticagrelor, in low-weight and elderly patients “is associated with maintained anti-ischemic efficacy while protecting these patients against the excess risk of bleeding,” he and his coinvestigators concluded.
Low-weight and older patients represented 27% of those enrolled in ISAR-REACT 5. When compared to the study population as a whole, the risk for both ischemic and bleeding events was at least twice as high, the authors of an accompanying editorial observed. They praised this effort to refine the optimal antiplatelet regimen in a very-high-risk ACS population.
“The current analysis suggests that the prasugrel dose reduction regimen for elderly or underweight patients with ACS is effective and safe,” according to the editorial coauthors, David Conen, MD, and P.J. Devereaux, MD, PhD, who are affiliated with the Population Health Research Institute, Hamilton, Ontario.
This substudy was underpowered to show superiority for the efficacy and safety outcomes in elderly and low-weight ACS patients, which makes these results “hypothesis generating,” but the authors believe that they provide the best available evidence for selecting antiplatelet therapy in this challenging subgroup. Although the exclusion of patients at very high risk of bleeding from ISAR-REACT 5 suggest findings might not be relevant to all elderly and low-weight individuals, the investigators believe the data do inform clinical practice.
“Our study is the first head-to-head randomized comparison of the reduced dose of prasugrel against standard dose of ticagrelor in elderly and low-weight patients,” said Dr. Kastrati in an interview. “Specifically designed studies for this subset of patients are very unlikely to be conducted in the future.”
Dr. Kastrati reported no potential conflicts of interest relevant to this study.
SOURCE: Menichelli M et al. Ann Intern Med. 2020 Jul 21. doi: 10.7326/M20-1806.
FROM ANNALS OF INTERNAL MEDICINE
New oral anticoagulants drive ACC consensus on bleeding
Patients on oral anticoagulants who experience a bleeding event may be able to discontinue therapy if certain circumstances apply, according to updated guidance from the American College of Cardiology.
The emergence of direct-acting oral anticoagulants (DOACs) to prevent venous thromboembolism and the introduction of new reversal strategies for factor Xa inhibitors prompted the creation of an Expert Consensus Decision Pathway to update the version from 2017, according to the ACC. Expert consensus decision pathways (ECDPs) are a component of the solution sets issued by the ACC to “address key questions facing care teams and attempt to provide practical guidance to be applied at the point of care.”
In an ECDP published in the Journal of the American College of Cardiology, the writing committee members developed treatment algorithms for managing bleeding in patients on DOACs and vitamin K antagonists (VKAs).
Bleeding was classified as major or nonmajor, with major defined as “bleeding that is associated with hemodynamic compromise, occurs in an anatomically critical site, requires transfusion of at least 2 units of packed red blood cells [RBCs]), or results in a hemoglobin drop greater than 2 g/dL. All other types of bleeding were classified as nonmajor.
The document includes a graphic algorithm for assessing bleed severity and managing major versus nonmajor bleeding, and a separate graphic describes considerations for reversal and use of hemostatic agents according to whether the patient is taking a VKA (warfarin and other coumarins), a direct thrombin inhibitor (dabigatran), the factor Xa inhibitors apixaban and rivaroxaban, or the factor Xa inhibitors betrixaban and edoxaban.
Another algorithm outlines whether to discontinue, delay, or restart anticoagulation. Considerations for restarting anticoagulation include whether the patient is pregnant, awaiting an invasive procedure, not able to receive medication by mouth, has a high risk of rebleeding, or is being bridged back to a vitamin K antagonist with high thrombotic risk.
In most cases of GI bleeding, for example, current data support restarting oral anticoagulants once hemostasis is achieved, but patients who experience intracranial hemorrhage should delay restarting any anticoagulation for at least 4 weeks if they are without high thrombotic risk, according to the document.
The report also recommends clinician-patient discussion before resuming anticoagulation, ideally with time allowed for patients to develop questions. Discussions should include the signs of bleeding, assessment of risk for a thromboembolic event, and the benefits of anticoagulation.
“The proliferation of oral anticoagulants (warfarin and DOACs) and growing indications for their use prompted the need for guidance on the management of these drugs,” said Gordon F. Tomaselli, MD, chair of the writing committee, in an interview. “This document provides guidance on management at the time of a bleeding complication. This includes acute management, starting and stopping drugs, and use of reversal agents,” he said. “This of course will be a dynamic document as the list of these drugs and their antidotes expand,” he noted.
“The biggest change from the previous guidelines are twofold: an update on laboratory assessment to monitor drug levels and use of reversal agents,” while the acute management strategies have otherwise remained similar to previous documents, said Dr. Tomaselli.
Dr. Tomaselli said that he was not surprised by the biological aspects of recent research while developing the statement. However, “the extent of the use of multiple anticoagulants and antiplatelet agents was a bit surprising and complicates therapy with each of the agents,” he noted.
The way the pathways are presented may make them challenging to follow in clinical practice, said Dr. Tomaselli. “The pathways are described linearly and in practice often many things have to happen at once,” he said. “The other main issue may be limitations in the availability of some of the newer reversal agents,” he added.
“The complication of bleeding is difficult to avoid,” said Dr. Tomaselli, and for future research, “the focus needs to continue to refine the indications for anticoagulation and appropriate use with other drugs that predispose to bleeding. We also need better methods and testing to monitor drugs levels and the effect on coagulation,” he said.
In accordance with the ACC Solution Set Oversight Committee, the writing committee members, including Dr. Tomaselli, had no relevant relationships with industry to disclose.
SOURCE: Tomaselli GF et al. J Am Coll Cardiol. 2020. doi: 10.1016/j.jacc.2020.04.053.
Patients on oral anticoagulants who experience a bleeding event may be able to discontinue therapy if certain circumstances apply, according to updated guidance from the American College of Cardiology.
The emergence of direct-acting oral anticoagulants (DOACs) to prevent venous thromboembolism and the introduction of new reversal strategies for factor Xa inhibitors prompted the creation of an Expert Consensus Decision Pathway to update the version from 2017, according to the ACC. Expert consensus decision pathways (ECDPs) are a component of the solution sets issued by the ACC to “address key questions facing care teams and attempt to provide practical guidance to be applied at the point of care.”
In an ECDP published in the Journal of the American College of Cardiology, the writing committee members developed treatment algorithms for managing bleeding in patients on DOACs and vitamin K antagonists (VKAs).
Bleeding was classified as major or nonmajor, with major defined as “bleeding that is associated with hemodynamic compromise, occurs in an anatomically critical site, requires transfusion of at least 2 units of packed red blood cells [RBCs]), or results in a hemoglobin drop greater than 2 g/dL. All other types of bleeding were classified as nonmajor.
The document includes a graphic algorithm for assessing bleed severity and managing major versus nonmajor bleeding, and a separate graphic describes considerations for reversal and use of hemostatic agents according to whether the patient is taking a VKA (warfarin and other coumarins), a direct thrombin inhibitor (dabigatran), the factor Xa inhibitors apixaban and rivaroxaban, or the factor Xa inhibitors betrixaban and edoxaban.
Another algorithm outlines whether to discontinue, delay, or restart anticoagulation. Considerations for restarting anticoagulation include whether the patient is pregnant, awaiting an invasive procedure, not able to receive medication by mouth, has a high risk of rebleeding, or is being bridged back to a vitamin K antagonist with high thrombotic risk.
In most cases of GI bleeding, for example, current data support restarting oral anticoagulants once hemostasis is achieved, but patients who experience intracranial hemorrhage should delay restarting any anticoagulation for at least 4 weeks if they are without high thrombotic risk, according to the document.
The report also recommends clinician-patient discussion before resuming anticoagulation, ideally with time allowed for patients to develop questions. Discussions should include the signs of bleeding, assessment of risk for a thromboembolic event, and the benefits of anticoagulation.
“The proliferation of oral anticoagulants (warfarin and DOACs) and growing indications for their use prompted the need for guidance on the management of these drugs,” said Gordon F. Tomaselli, MD, chair of the writing committee, in an interview. “This document provides guidance on management at the time of a bleeding complication. This includes acute management, starting and stopping drugs, and use of reversal agents,” he said. “This of course will be a dynamic document as the list of these drugs and their antidotes expand,” he noted.
“The biggest change from the previous guidelines are twofold: an update on laboratory assessment to monitor drug levels and use of reversal agents,” while the acute management strategies have otherwise remained similar to previous documents, said Dr. Tomaselli.
Dr. Tomaselli said that he was not surprised by the biological aspects of recent research while developing the statement. However, “the extent of the use of multiple anticoagulants and antiplatelet agents was a bit surprising and complicates therapy with each of the agents,” he noted.
The way the pathways are presented may make them challenging to follow in clinical practice, said Dr. Tomaselli. “The pathways are described linearly and in practice often many things have to happen at once,” he said. “The other main issue may be limitations in the availability of some of the newer reversal agents,” he added.
“The complication of bleeding is difficult to avoid,” said Dr. Tomaselli, and for future research, “the focus needs to continue to refine the indications for anticoagulation and appropriate use with other drugs that predispose to bleeding. We also need better methods and testing to monitor drugs levels and the effect on coagulation,” he said.
In accordance with the ACC Solution Set Oversight Committee, the writing committee members, including Dr. Tomaselli, had no relevant relationships with industry to disclose.
SOURCE: Tomaselli GF et al. J Am Coll Cardiol. 2020. doi: 10.1016/j.jacc.2020.04.053.
Patients on oral anticoagulants who experience a bleeding event may be able to discontinue therapy if certain circumstances apply, according to updated guidance from the American College of Cardiology.
The emergence of direct-acting oral anticoagulants (DOACs) to prevent venous thromboembolism and the introduction of new reversal strategies for factor Xa inhibitors prompted the creation of an Expert Consensus Decision Pathway to update the version from 2017, according to the ACC. Expert consensus decision pathways (ECDPs) are a component of the solution sets issued by the ACC to “address key questions facing care teams and attempt to provide practical guidance to be applied at the point of care.”
In an ECDP published in the Journal of the American College of Cardiology, the writing committee members developed treatment algorithms for managing bleeding in patients on DOACs and vitamin K antagonists (VKAs).
Bleeding was classified as major or nonmajor, with major defined as “bleeding that is associated with hemodynamic compromise, occurs in an anatomically critical site, requires transfusion of at least 2 units of packed red blood cells [RBCs]), or results in a hemoglobin drop greater than 2 g/dL. All other types of bleeding were classified as nonmajor.
The document includes a graphic algorithm for assessing bleed severity and managing major versus nonmajor bleeding, and a separate graphic describes considerations for reversal and use of hemostatic agents according to whether the patient is taking a VKA (warfarin and other coumarins), a direct thrombin inhibitor (dabigatran), the factor Xa inhibitors apixaban and rivaroxaban, or the factor Xa inhibitors betrixaban and edoxaban.
Another algorithm outlines whether to discontinue, delay, or restart anticoagulation. Considerations for restarting anticoagulation include whether the patient is pregnant, awaiting an invasive procedure, not able to receive medication by mouth, has a high risk of rebleeding, or is being bridged back to a vitamin K antagonist with high thrombotic risk.
In most cases of GI bleeding, for example, current data support restarting oral anticoagulants once hemostasis is achieved, but patients who experience intracranial hemorrhage should delay restarting any anticoagulation for at least 4 weeks if they are without high thrombotic risk, according to the document.
The report also recommends clinician-patient discussion before resuming anticoagulation, ideally with time allowed for patients to develop questions. Discussions should include the signs of bleeding, assessment of risk for a thromboembolic event, and the benefits of anticoagulation.
“The proliferation of oral anticoagulants (warfarin and DOACs) and growing indications for their use prompted the need for guidance on the management of these drugs,” said Gordon F. Tomaselli, MD, chair of the writing committee, in an interview. “This document provides guidance on management at the time of a bleeding complication. This includes acute management, starting and stopping drugs, and use of reversal agents,” he said. “This of course will be a dynamic document as the list of these drugs and their antidotes expand,” he noted.
“The biggest change from the previous guidelines are twofold: an update on laboratory assessment to monitor drug levels and use of reversal agents,” while the acute management strategies have otherwise remained similar to previous documents, said Dr. Tomaselli.
Dr. Tomaselli said that he was not surprised by the biological aspects of recent research while developing the statement. However, “the extent of the use of multiple anticoagulants and antiplatelet agents was a bit surprising and complicates therapy with each of the agents,” he noted.
The way the pathways are presented may make them challenging to follow in clinical practice, said Dr. Tomaselli. “The pathways are described linearly and in practice often many things have to happen at once,” he said. “The other main issue may be limitations in the availability of some of the newer reversal agents,” he added.
“The complication of bleeding is difficult to avoid,” said Dr. Tomaselli, and for future research, “the focus needs to continue to refine the indications for anticoagulation and appropriate use with other drugs that predispose to bleeding. We also need better methods and testing to monitor drugs levels and the effect on coagulation,” he said.
In accordance with the ACC Solution Set Oversight Committee, the writing committee members, including Dr. Tomaselli, had no relevant relationships with industry to disclose.
SOURCE: Tomaselli GF et al. J Am Coll Cardiol. 2020. doi: 10.1016/j.jacc.2020.04.053.
FROM THE JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY
PCI or not, mortality climbs with post-ACS bleeding complications
Patients with acute coronary syndromes (ACS) with later bleeding complications that were at least moderate in severity showed a 15-fold increased risk of dying within 30 days, compared with those without such bleeding, in a pooled analysis of four randomized antithrombotic-therapy trials.
Mortality 1 month to 1 year after a bleeding event was not as sharply increased, but there was still almost triple the risk seen in patients without bleeding complications.
In both cases, the risk increase was independent of whether percutaneous coronary intervention (PCI) had been part of the management of ACS, concludes the study, published in the July 14 issue of the Journal of the American College of Cardiology.
“We showed that postdischarge bleeding was associated with a pretty bad prognosis, in terms of all-cause mortality, regardless of the index treatment – PCI or medical therapy,” lead author Guillaume Marquis-Gravel, MD, MSc, Duke Clinical Research Institute, Durham, N.C., said in an interview.
“Our data suggest that we should care about bleeding prevention in patients who had a previous ACS, regardless of the treatment strategy, as much as we care for prevention of future ischemic events,” said Dr. Marquis-Gravel, who is also an interventional cardiologist at the Montreal Heart Institute.
“This large-scale analysis clearly demonstrates that bleeding events occurring among ACS patients with coronary stents carry the same prognostic significance in magnitude and time course as among patients who do not undergo PCI,” observed Derek Chew, MBBS, MPH, PhD, of Flinders University, Adelaide, Australia, and Jack Wei Chieh Tan, MBBS, MBA, of National Heart Centre, Singapore, in an accompanying editorial.
“Therefore, at least in the later phases of planning antithrombotic therapy, when weighting bleeding risk in these conditions, these estimates should not be ‘discounted’ for the absence or presence of PCI during the initial ACS management,” they wrote.
A “proven assumption”
“A great deal of research has previously been conducted to tailor DAPT [dual-antiplatelet therapy] and to minimize bleeding risk following PCI based on the proven assumption that bleeding is associated with adverse clinical outcomes,” Dr. Marques-Gravel explained.
“The prognostic impact of postdischarge bleeding has not been studied thoroughly in patients with ACS who were only treated medically with DAPT without PCI.” Yet this population makes up a large proportion of the ACS population, and patients are “generally older and sicker” and therefore at increased risk for both ischemic and bleeding events, he said.
The researchers explored those issues in a post hoc pooled analysis of four randomized comparisons of antithrombotic strategies in patients with ACS: APPRAISE-2, PLATO, TRACER, and TRILOGY ACS. The analyses tracked bleeding events that took place from a landmark time of 7 days after presentation with ACS over a median follow-up of 1 year in 45,011 patients (31.3% female), 48% of whom were managed with PCI.
Those treated with PCI, compared with those medically managed only, tended to be younger, more often male, more likely to have ST-segment elevation myocardial infarction (STEMI) as their ACS, and less likely to have cardiovascular comorbidities.
During the total follow-up of 48,717 person-years, the postdischarge rate of moderate, severe, or life-threatening bleeding defined by GUSTO criteria reached 2.6 events per 100 patient-years. A total of 2,149 patients died, and mortality was consistently higher in patients who had such bleeding complications. They showed an adjusted hazard ratio of 15.7 (95% confidence interval, 12.3-20.0) for mortality within 30 days, compared with patients without bleeds. Their HR for mortality at 30 days to 1 year was 2.7 (95% CI, 2.1-3.4).
The association between bleeding complications and mortality remained consistent, regardless of whether patients had undergone PCI for their ACS (interaction P = .240).
A pragmatic interpretation
Although an observational study can’t show causality between bleeding and mortality, Dr. Marquis-Gravel cautioned, “the fact that the majority of deaths occurred early after the bleeding event, within 30 days, is strongly suggestive of a causal relationship.”
He recommended a “pragmatic interpretation” of the study: “Bleeding avoidance strategies tested in PCI populations, including short-term DAPT or aspirin-free strategies, should also be considered in medically treated patients with ACS deemed at higher risk of bleeding.”
“It is clear that bleeding events after successful PCI for an ACS are independently associated with increased mortality and morbidity,” Debabrata Mukherjee, MD, of Texas Tech University, El Paso, said in an interview.
“Every effort should be made to minimize bleeding events with the use of appropriate access site for PCI, dosing, selection, and duration of antiplatelet and antithrombotic agents, and use of proton pump inhibitors when appropriate,” he said.
The clinical decision-making involved in this individualized approach “is often not easy,” said Dr. Mukherjee, who was not involved in the current study. “Integrating patients and clinical pharmacists in choosing optimal antithrombotic therapies post-MI is likely to be helpful” in the process.
Although “major bleeding following ACS increases the risk of mortality for both medically managed and PCI-managed patients with ACS, the vast majority of deaths, 90%, occur in those that have not had a bleed,” Mamas A. Mamas, DPhil, Keele University, Staffordshire, England, said in an interview.
“It is important to understand the causes of death in this population and think about how interventions may impact on this,” agreed Dr. Mamas, who was not involved in the study.
Dr. Marquis-Gravel reported receiving speaking fees and honoraria from Servier and Novartis; disclosures for the other authors are in the report. Dr. Chew reported receiving speaking fees and institutional grants in aid from Roche Diagnostics, AstraZeneca, and Edwards Lifesciences. Dr. Tan discloses receiving speaking fees and educational grants from Amgen, Roche Diagnostics, AstraZeneca, Bayer, and Abbott Vascular. Dr. Mukherjee and Dr. Mamas report no relevant financial relationships.
A version of this article originally appeared on Medscape.com.
Patients with acute coronary syndromes (ACS) with later bleeding complications that were at least moderate in severity showed a 15-fold increased risk of dying within 30 days, compared with those without such bleeding, in a pooled analysis of four randomized antithrombotic-therapy trials.
Mortality 1 month to 1 year after a bleeding event was not as sharply increased, but there was still almost triple the risk seen in patients without bleeding complications.
In both cases, the risk increase was independent of whether percutaneous coronary intervention (PCI) had been part of the management of ACS, concludes the study, published in the July 14 issue of the Journal of the American College of Cardiology.
“We showed that postdischarge bleeding was associated with a pretty bad prognosis, in terms of all-cause mortality, regardless of the index treatment – PCI or medical therapy,” lead author Guillaume Marquis-Gravel, MD, MSc, Duke Clinical Research Institute, Durham, N.C., said in an interview.
“Our data suggest that we should care about bleeding prevention in patients who had a previous ACS, regardless of the treatment strategy, as much as we care for prevention of future ischemic events,” said Dr. Marquis-Gravel, who is also an interventional cardiologist at the Montreal Heart Institute.
“This large-scale analysis clearly demonstrates that bleeding events occurring among ACS patients with coronary stents carry the same prognostic significance in magnitude and time course as among patients who do not undergo PCI,” observed Derek Chew, MBBS, MPH, PhD, of Flinders University, Adelaide, Australia, and Jack Wei Chieh Tan, MBBS, MBA, of National Heart Centre, Singapore, in an accompanying editorial.
“Therefore, at least in the later phases of planning antithrombotic therapy, when weighting bleeding risk in these conditions, these estimates should not be ‘discounted’ for the absence or presence of PCI during the initial ACS management,” they wrote.
A “proven assumption”
“A great deal of research has previously been conducted to tailor DAPT [dual-antiplatelet therapy] and to minimize bleeding risk following PCI based on the proven assumption that bleeding is associated with adverse clinical outcomes,” Dr. Marques-Gravel explained.
“The prognostic impact of postdischarge bleeding has not been studied thoroughly in patients with ACS who were only treated medically with DAPT without PCI.” Yet this population makes up a large proportion of the ACS population, and patients are “generally older and sicker” and therefore at increased risk for both ischemic and bleeding events, he said.
The researchers explored those issues in a post hoc pooled analysis of four randomized comparisons of antithrombotic strategies in patients with ACS: APPRAISE-2, PLATO, TRACER, and TRILOGY ACS. The analyses tracked bleeding events that took place from a landmark time of 7 days after presentation with ACS over a median follow-up of 1 year in 45,011 patients (31.3% female), 48% of whom were managed with PCI.
Those treated with PCI, compared with those medically managed only, tended to be younger, more often male, more likely to have ST-segment elevation myocardial infarction (STEMI) as their ACS, and less likely to have cardiovascular comorbidities.
During the total follow-up of 48,717 person-years, the postdischarge rate of moderate, severe, or life-threatening bleeding defined by GUSTO criteria reached 2.6 events per 100 patient-years. A total of 2,149 patients died, and mortality was consistently higher in patients who had such bleeding complications. They showed an adjusted hazard ratio of 15.7 (95% confidence interval, 12.3-20.0) for mortality within 30 days, compared with patients without bleeds. Their HR for mortality at 30 days to 1 year was 2.7 (95% CI, 2.1-3.4).
The association between bleeding complications and mortality remained consistent, regardless of whether patients had undergone PCI for their ACS (interaction P = .240).
A pragmatic interpretation
Although an observational study can’t show causality between bleeding and mortality, Dr. Marquis-Gravel cautioned, “the fact that the majority of deaths occurred early after the bleeding event, within 30 days, is strongly suggestive of a causal relationship.”
He recommended a “pragmatic interpretation” of the study: “Bleeding avoidance strategies tested in PCI populations, including short-term DAPT or aspirin-free strategies, should also be considered in medically treated patients with ACS deemed at higher risk of bleeding.”
“It is clear that bleeding events after successful PCI for an ACS are independently associated with increased mortality and morbidity,” Debabrata Mukherjee, MD, of Texas Tech University, El Paso, said in an interview.
“Every effort should be made to minimize bleeding events with the use of appropriate access site for PCI, dosing, selection, and duration of antiplatelet and antithrombotic agents, and use of proton pump inhibitors when appropriate,” he said.
The clinical decision-making involved in this individualized approach “is often not easy,” said Dr. Mukherjee, who was not involved in the current study. “Integrating patients and clinical pharmacists in choosing optimal antithrombotic therapies post-MI is likely to be helpful” in the process.
Although “major bleeding following ACS increases the risk of mortality for both medically managed and PCI-managed patients with ACS, the vast majority of deaths, 90%, occur in those that have not had a bleed,” Mamas A. Mamas, DPhil, Keele University, Staffordshire, England, said in an interview.
“It is important to understand the causes of death in this population and think about how interventions may impact on this,” agreed Dr. Mamas, who was not involved in the study.
Dr. Marquis-Gravel reported receiving speaking fees and honoraria from Servier and Novartis; disclosures for the other authors are in the report. Dr. Chew reported receiving speaking fees and institutional grants in aid from Roche Diagnostics, AstraZeneca, and Edwards Lifesciences. Dr. Tan discloses receiving speaking fees and educational grants from Amgen, Roche Diagnostics, AstraZeneca, Bayer, and Abbott Vascular. Dr. Mukherjee and Dr. Mamas report no relevant financial relationships.
A version of this article originally appeared on Medscape.com.
Patients with acute coronary syndromes (ACS) with later bleeding complications that were at least moderate in severity showed a 15-fold increased risk of dying within 30 days, compared with those without such bleeding, in a pooled analysis of four randomized antithrombotic-therapy trials.
Mortality 1 month to 1 year after a bleeding event was not as sharply increased, but there was still almost triple the risk seen in patients without bleeding complications.
In both cases, the risk increase was independent of whether percutaneous coronary intervention (PCI) had been part of the management of ACS, concludes the study, published in the July 14 issue of the Journal of the American College of Cardiology.
“We showed that postdischarge bleeding was associated with a pretty bad prognosis, in terms of all-cause mortality, regardless of the index treatment – PCI or medical therapy,” lead author Guillaume Marquis-Gravel, MD, MSc, Duke Clinical Research Institute, Durham, N.C., said in an interview.
“Our data suggest that we should care about bleeding prevention in patients who had a previous ACS, regardless of the treatment strategy, as much as we care for prevention of future ischemic events,” said Dr. Marquis-Gravel, who is also an interventional cardiologist at the Montreal Heart Institute.
“This large-scale analysis clearly demonstrates that bleeding events occurring among ACS patients with coronary stents carry the same prognostic significance in magnitude and time course as among patients who do not undergo PCI,” observed Derek Chew, MBBS, MPH, PhD, of Flinders University, Adelaide, Australia, and Jack Wei Chieh Tan, MBBS, MBA, of National Heart Centre, Singapore, in an accompanying editorial.
“Therefore, at least in the later phases of planning antithrombotic therapy, when weighting bleeding risk in these conditions, these estimates should not be ‘discounted’ for the absence or presence of PCI during the initial ACS management,” they wrote.
A “proven assumption”
“A great deal of research has previously been conducted to tailor DAPT [dual-antiplatelet therapy] and to minimize bleeding risk following PCI based on the proven assumption that bleeding is associated with adverse clinical outcomes,” Dr. Marques-Gravel explained.
“The prognostic impact of postdischarge bleeding has not been studied thoroughly in patients with ACS who were only treated medically with DAPT without PCI.” Yet this population makes up a large proportion of the ACS population, and patients are “generally older and sicker” and therefore at increased risk for both ischemic and bleeding events, he said.
The researchers explored those issues in a post hoc pooled analysis of four randomized comparisons of antithrombotic strategies in patients with ACS: APPRAISE-2, PLATO, TRACER, and TRILOGY ACS. The analyses tracked bleeding events that took place from a landmark time of 7 days after presentation with ACS over a median follow-up of 1 year in 45,011 patients (31.3% female), 48% of whom were managed with PCI.
Those treated with PCI, compared with those medically managed only, tended to be younger, more often male, more likely to have ST-segment elevation myocardial infarction (STEMI) as their ACS, and less likely to have cardiovascular comorbidities.
During the total follow-up of 48,717 person-years, the postdischarge rate of moderate, severe, or life-threatening bleeding defined by GUSTO criteria reached 2.6 events per 100 patient-years. A total of 2,149 patients died, and mortality was consistently higher in patients who had such bleeding complications. They showed an adjusted hazard ratio of 15.7 (95% confidence interval, 12.3-20.0) for mortality within 30 days, compared with patients without bleeds. Their HR for mortality at 30 days to 1 year was 2.7 (95% CI, 2.1-3.4).
The association between bleeding complications and mortality remained consistent, regardless of whether patients had undergone PCI for their ACS (interaction P = .240).
A pragmatic interpretation
Although an observational study can’t show causality between bleeding and mortality, Dr. Marquis-Gravel cautioned, “the fact that the majority of deaths occurred early after the bleeding event, within 30 days, is strongly suggestive of a causal relationship.”
He recommended a “pragmatic interpretation” of the study: “Bleeding avoidance strategies tested in PCI populations, including short-term DAPT or aspirin-free strategies, should also be considered in medically treated patients with ACS deemed at higher risk of bleeding.”
“It is clear that bleeding events after successful PCI for an ACS are independently associated with increased mortality and morbidity,” Debabrata Mukherjee, MD, of Texas Tech University, El Paso, said in an interview.
“Every effort should be made to minimize bleeding events with the use of appropriate access site for PCI, dosing, selection, and duration of antiplatelet and antithrombotic agents, and use of proton pump inhibitors when appropriate,” he said.
The clinical decision-making involved in this individualized approach “is often not easy,” said Dr. Mukherjee, who was not involved in the current study. “Integrating patients and clinical pharmacists in choosing optimal antithrombotic therapies post-MI is likely to be helpful” in the process.
Although “major bleeding following ACS increases the risk of mortality for both medically managed and PCI-managed patients with ACS, the vast majority of deaths, 90%, occur in those that have not had a bleed,” Mamas A. Mamas, DPhil, Keele University, Staffordshire, England, said in an interview.
“It is important to understand the causes of death in this population and think about how interventions may impact on this,” agreed Dr. Mamas, who was not involved in the study.
Dr. Marquis-Gravel reported receiving speaking fees and honoraria from Servier and Novartis; disclosures for the other authors are in the report. Dr. Chew reported receiving speaking fees and institutional grants in aid from Roche Diagnostics, AstraZeneca, and Edwards Lifesciences. Dr. Tan discloses receiving speaking fees and educational grants from Amgen, Roche Diagnostics, AstraZeneca, Bayer, and Abbott Vascular. Dr. Mukherjee and Dr. Mamas report no relevant financial relationships.
A version of this article originally appeared on Medscape.com.
Acetaminophen beats fentanyl in STEMI
Swapping out intravenous fentanyl in favor of IV acetaminophen in patients with ST-elevation MI (STEMI) provides comparable pain relief but with desirably higher blood levels of ticagrelor both immediately after primary percutaneous intervention and 1 hour post procedure.
That’s according to results of the Dutch ON-TIME 3 trial, presented by Anne H. Tavenier, MD, at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.
“Our trial results have implications for the prehospital treatment of STEMI patients,” said Dr. Tavenier, a cardiologist at the Isala Clinic in Zwolle, the Netherlands.
The explanation for the success of this novel STEMI pain management strategy? The synthetic opioid fentanyl impairs gastrointestinal absorption of oral P2Y12 receptor antagonists such as ticagrelor. Opiates do so as well, whereas acetaminophen does not, she explained.
The potent platelet inhibition provided by oral P2Y12 inhibitors is crucial to successful primary PCI for STEMI. But these platelet inhibitory effects are inherently slowed in STEMI patients owing to hemodynamic changes and delayed GI absorption. And even though both American College of Cardiology/American Heart Association and European Society of Cardiology guidelines recommend the use of opioids for pain control in STEMI patients, the fact is that these medications further delay the absorption of oral P2Y12 inhibitors. And this delay is further exacerbated by the nausea and vomiting which are common side effects of IV fentanyl, she continued.
The impetus for the ON-TIME 3 trial was straightforward, the cardiologist said: “For years, STEMI patients have been treated with morphine or morphinelike drugs like fentanyl because of pain or sympathetic stress. To date, trials investigating alternative analgesics to opioids have been scarce.”
ON-TIME 3 was a multicenter, open-label, phase 4 clinical trial in which 195 STEMI patients with a self-reported pain score of at least 4 on a 0-10 scale received crushed ticagrelor in the ambulance along with either 1,000 mg of IV acetaminophen or fentanyl at 1-2 mcg/kg.
Ticagrelor blood levels were significantly higher in the IV acetaminophen group when measured just prior to primary PCI (151 ng/mL versus 60 ng/mL in the IV fentanyl group; immediately after PCI (326 versus 115 ng/mL), and 1 hour post PCI (488 versus 372 ng/mL).
However, there was no significant between-group difference in levels of platelet reactivity units measured immediately after primary PCI, Dr. Tavenier added.
Discussant Christoph K. Naber, MD, PhD, confessed that prior to ON-TIME 3 he was unaware that administering opioids to STEMI patients results in delayed absorption of oral P2Y12 inhibitors. Upon delving into the literature, however, he found that this is indeed a well-documented problem.
“The open question I have about this very elegant trial is whether the increased P2Y12 levels will translate into a measurable difference in clinical outcomes,” said Dr. Naber, an interventional cardiologist at the Wilhemshaven (Germany) Clinic.
The answer to that question would require a larger, longer-term trial. And he’s disinclined to wait around for that to happen.
“I think when we look at the risk balance, the risk of switching from an opioid to acetaminophen, if it works for the patient, is rather low. So this might be something to introduce in my practice,” the cardiologist said.
Dr. Tavenier and Dr. Naber reported having no financial conflicts of interest.
SOURCE: Tavenier AH. EuroPCR 2020.
Swapping out intravenous fentanyl in favor of IV acetaminophen in patients with ST-elevation MI (STEMI) provides comparable pain relief but with desirably higher blood levels of ticagrelor both immediately after primary percutaneous intervention and 1 hour post procedure.
That’s according to results of the Dutch ON-TIME 3 trial, presented by Anne H. Tavenier, MD, at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.
“Our trial results have implications for the prehospital treatment of STEMI patients,” said Dr. Tavenier, a cardiologist at the Isala Clinic in Zwolle, the Netherlands.
The explanation for the success of this novel STEMI pain management strategy? The synthetic opioid fentanyl impairs gastrointestinal absorption of oral P2Y12 receptor antagonists such as ticagrelor. Opiates do so as well, whereas acetaminophen does not, she explained.
The potent platelet inhibition provided by oral P2Y12 inhibitors is crucial to successful primary PCI for STEMI. But these platelet inhibitory effects are inherently slowed in STEMI patients owing to hemodynamic changes and delayed GI absorption. And even though both American College of Cardiology/American Heart Association and European Society of Cardiology guidelines recommend the use of opioids for pain control in STEMI patients, the fact is that these medications further delay the absorption of oral P2Y12 inhibitors. And this delay is further exacerbated by the nausea and vomiting which are common side effects of IV fentanyl, she continued.
The impetus for the ON-TIME 3 trial was straightforward, the cardiologist said: “For years, STEMI patients have been treated with morphine or morphinelike drugs like fentanyl because of pain or sympathetic stress. To date, trials investigating alternative analgesics to opioids have been scarce.”
ON-TIME 3 was a multicenter, open-label, phase 4 clinical trial in which 195 STEMI patients with a self-reported pain score of at least 4 on a 0-10 scale received crushed ticagrelor in the ambulance along with either 1,000 mg of IV acetaminophen or fentanyl at 1-2 mcg/kg.
Ticagrelor blood levels were significantly higher in the IV acetaminophen group when measured just prior to primary PCI (151 ng/mL versus 60 ng/mL in the IV fentanyl group; immediately after PCI (326 versus 115 ng/mL), and 1 hour post PCI (488 versus 372 ng/mL).
However, there was no significant between-group difference in levels of platelet reactivity units measured immediately after primary PCI, Dr. Tavenier added.
Discussant Christoph K. Naber, MD, PhD, confessed that prior to ON-TIME 3 he was unaware that administering opioids to STEMI patients results in delayed absorption of oral P2Y12 inhibitors. Upon delving into the literature, however, he found that this is indeed a well-documented problem.
“The open question I have about this very elegant trial is whether the increased P2Y12 levels will translate into a measurable difference in clinical outcomes,” said Dr. Naber, an interventional cardiologist at the Wilhemshaven (Germany) Clinic.
The answer to that question would require a larger, longer-term trial. And he’s disinclined to wait around for that to happen.
“I think when we look at the risk balance, the risk of switching from an opioid to acetaminophen, if it works for the patient, is rather low. So this might be something to introduce in my practice,” the cardiologist said.
Dr. Tavenier and Dr. Naber reported having no financial conflicts of interest.
SOURCE: Tavenier AH. EuroPCR 2020.
Swapping out intravenous fentanyl in favor of IV acetaminophen in patients with ST-elevation MI (STEMI) provides comparable pain relief but with desirably higher blood levels of ticagrelor both immediately after primary percutaneous intervention and 1 hour post procedure.
That’s according to results of the Dutch ON-TIME 3 trial, presented by Anne H. Tavenier, MD, at the virtual annual meeting of the European Association of Percutaneous Cardiovascular Interventions.
“Our trial results have implications for the prehospital treatment of STEMI patients,” said Dr. Tavenier, a cardiologist at the Isala Clinic in Zwolle, the Netherlands.
The explanation for the success of this novel STEMI pain management strategy? The synthetic opioid fentanyl impairs gastrointestinal absorption of oral P2Y12 receptor antagonists such as ticagrelor. Opiates do so as well, whereas acetaminophen does not, she explained.
The potent platelet inhibition provided by oral P2Y12 inhibitors is crucial to successful primary PCI for STEMI. But these platelet inhibitory effects are inherently slowed in STEMI patients owing to hemodynamic changes and delayed GI absorption. And even though both American College of Cardiology/American Heart Association and European Society of Cardiology guidelines recommend the use of opioids for pain control in STEMI patients, the fact is that these medications further delay the absorption of oral P2Y12 inhibitors. And this delay is further exacerbated by the nausea and vomiting which are common side effects of IV fentanyl, she continued.
The impetus for the ON-TIME 3 trial was straightforward, the cardiologist said: “For years, STEMI patients have been treated with morphine or morphinelike drugs like fentanyl because of pain or sympathetic stress. To date, trials investigating alternative analgesics to opioids have been scarce.”
ON-TIME 3 was a multicenter, open-label, phase 4 clinical trial in which 195 STEMI patients with a self-reported pain score of at least 4 on a 0-10 scale received crushed ticagrelor in the ambulance along with either 1,000 mg of IV acetaminophen or fentanyl at 1-2 mcg/kg.
Ticagrelor blood levels were significantly higher in the IV acetaminophen group when measured just prior to primary PCI (151 ng/mL versus 60 ng/mL in the IV fentanyl group; immediately after PCI (326 versus 115 ng/mL), and 1 hour post PCI (488 versus 372 ng/mL).
However, there was no significant between-group difference in levels of platelet reactivity units measured immediately after primary PCI, Dr. Tavenier added.
Discussant Christoph K. Naber, MD, PhD, confessed that prior to ON-TIME 3 he was unaware that administering opioids to STEMI patients results in delayed absorption of oral P2Y12 inhibitors. Upon delving into the literature, however, he found that this is indeed a well-documented problem.
“The open question I have about this very elegant trial is whether the increased P2Y12 levels will translate into a measurable difference in clinical outcomes,” said Dr. Naber, an interventional cardiologist at the Wilhemshaven (Germany) Clinic.
The answer to that question would require a larger, longer-term trial. And he’s disinclined to wait around for that to happen.
“I think when we look at the risk balance, the risk of switching from an opioid to acetaminophen, if it works for the patient, is rather low. So this might be something to introduce in my practice,” the cardiologist said.
Dr. Tavenier and Dr. Naber reported having no financial conflicts of interest.
SOURCE: Tavenier AH. EuroPCR 2020.
REPORTING FROM EUROPCR 2020