Cardiology

ILLUSTRATIVE CASE

A 47-year-old man in generally good health presents to a family medicine clinic for a well visit. He does not use tobacco products and had a benign colonoscopy last year. He reports walking for 30 minutes 3 to 4 times per week for exercise, althoug h he has gained 3 lbs over the past 2 years. He has no family history of early coronary artery disease, but his father and older brother have hypertension. His mother has a history of diabetes and hyperlipidemia.

The patient’s physical exam is unremarkable except for an elevated BP reading of 151/82 mm Hg. A review of his chart indicates he has had multiple elevated readings in the past that have ranged from 132/72 mm Hg to 139/89 mm Hg. The patient is interested in antihypertensive treatment but wants to know if modifying his diet and replacing his regular table salt with a salt substitute will lower his high BP. What can you recommend?

Hypertension is a leading cause of CV morbidity and mortality worldwide and is linked to increased dietary sodium intake. An estimated 1.28 billion people worldwide have hypertension; however, more than half of cases are undiagnosed.² The US Preventive Services Task Force recommends screening for hypertension in adults older than 18 years and confirming elevated measurements conducted in a nonclinical setting before starting medication (grade “A”).³

Cut-points for the diagnosis of hypertension vary. The American Academy of Family Physicians, ⁴ the Eighth Joint National Committee (JNC 8), ⁵ the International Society of Hypertension, ⁶ and the European Society of Cardiology ⁷ use ≥ 140 mm Hg systolic BP (SBP) or ≥ 90 mm Hg diastolic BP (DBP) to define hypertension. The American College of Cardiology/American Heart Association guidelines use ≥ 130/80 mm Hg. ⁸

When treating patients with hypertension, primary care physicians often recommend lifestyle modifications such as the Dietary Approaches to Stop Hypertension (DASH) diet. Other lifestyle modifications include weight loss, tobacco cessation, reduced daily alcohol intake, and increased physical activity. ⁹

Systematic reviews have shown a measurable improvement in BP with sodium reduction and potassium substitution. ^10-12 More importantly, high-quality evidence demonstrates a decreased risk for CV disease, kidney disease, and all-cause mortality with lower dietary sodium intake. ¹³ Previous studies have shown that potassium-enriched salt substitutes lower BP, but their impact on CV morbidity and mortality is not well defined. Although lowering BP is associated with improved clinical impact, there is a lack of ­patient-oriented evidence that demonstrates improvement in CV disease and mortality.

The Salt Substitute and Stroke Study (SSaSS), published in 2021, demonstrated the protective effect of salt substitution against stroke, other CV events, and death. ¹⁴ Furthermore, this 5-year, cluster-randomized controlled trial of 20,995 participants across 600 villages in China demonstrated reduced CV mortality and BP reduction similar to standard pharmacologic treatment. Prior to SSaSS, 17 randomized controlled trials demonstrated a BP-lowering effect of salt substitutes but did not directly study the impact on clinical outcomes. ¹³

Continue to: In this 2022 systematic review...

In this 2022 systematic review and meta-analysis, ¹ Yin et al evaluated 21 trials, including SSaSS, for the effect of salt substitutes on BP and other clinical outcomes, and the generalizability of the study results to diverse populations. The systematic review included parallel-group, step-wedge, and cluster-­randomized controlled trials reporting the effect of salt substitutes on BP or clinical outcomes.

STUDY SUMMARY

Salt substitutes reduced BP across diverse populations

This systematic review and meta-analysis reviewed existing literature for randomized controlled trials investigating the effects of ­potassium-enriched salt substitutes on clinical outcomes for patients without kidney disease. The most commonly used salt substitute was potassium chloride, at 25% to 65% potassium.

The systematic review identified 21 trials comprising 31,949 study participants from 15 different countries with 1 to 60 months’ duration. Meta-analyses were performed using 19 trials for BP outcomes and 5 trials for vascular outcomes. Eleven trials were rated as having low risk for bias, 8 were deemed to have some concern, and 2 were rated as high risk for bias. Comparisons of data excluding studies with high risk for bias yielded results similar to comparisons of all studies.

The meta-analysis of 19 trials demonstrated reduced SBP (–4.6 mm Hg; 95% CI, –6.1 to –3.1) and DBP (–1.6 mm Hg; 95% CI, –2.4 to –0.8) in participants using potassium-enriched salt substitutes. However, the authors noted substantial heterogeneity among the studies (I ² > 70%) for both SBP and DBP outcomes. Although there were no subgroup differences for age, sex, hypertension history, or other biomarkers, outcome differences were associated with trial duration, baseline potassium intake, and composition of the salt substitute.

Consistent reduction in BP and clinical outcomes across diverse populations and regions suggests potential worldwide benefit from the use of potassium-enriched salt in appropriate patients.

Potassium-enriched salt substitutes were associated with reduced total mortality (risk ratio [RR] = 0.89; 95% CI, 0.85-0.94), CV mortality (RR = 0.87; 95% CI, 0.81-0.94), and CV events (RR = 0.89; 95% CI, 0.85-0.94). In a meta-regression, each 10% reduction in the sodium content of the salt substitute was ­associated with a 1.5–mm Hg greater reduction in SBP (95% CI, –3.0 to –0.03) and a 1.0–mm Hg greater reduction in DBP (95% CI, –1.8 to –0.1). However, the authors suggest interpreting meta-regression results with caution.

Continue to: Only 2 of the studes...

Only 2 of the studies in the systematic review explicitly reported the adverse effect of hyperkalemia, and there was no statistical difference in events between randomized groups. Eight other studies reported no serious adverse events related to hyperkalemia , and 11 studies did not report on the risk for hyperkalemia.

WHAT’S NEW

High-quality data demonstrate beneficial outcomes

Previous observational and interventional studies demonstrated a BP-lowering effect of salt substitutes, but limited data with poor-quality evidence existed for the impact of salt substitutes on clinical outcomes such as mortality and CV events. This systematic review and meta-analysis suggests that ­potassium-supplemented salt may reduce BP and secondarily reduce the risk for CV events, CV mortality, and total mortality, without clear harmful effects reported.

CAVEATS

Some patient populations, comorbidities excluded from study

The study did not include patients with kidney disease or those taking potassium-sparing diuretics. Furthermore, the available data do not include primary prevention participants.

Although BP reduction due to salt substitutes may be small at an individual level, these levels of reduction may be important at a population level.

Subgroup analyses should be interpreted with caution due to the small number of trials available for individual subgroups. In addition, funnel plot asymmetry for studies reporting DBP suggests at least some effect of publication bias for that outcome.

Although BP reduction due to salt substitutes may be small at an individual level, these levels of reduction may be important at a population level.

CHALLENGES TO IMPLEMENTATION

For appropriate patients, no challenges anticipated

There are no significant challenges to implementing conclusions from this study in the primary care setting. Family physicians should be able to recommend potassium-enriched salt substitutes to patients with hypertension who are not at risk for hyperkalemia, including those with kidney disease, on potassium-­sparing diuretics, or with a history of hyperkalemia/hyperkalemic conditions. Salt substitutes, including potassium-enriched salts, are readily available in stores.

ILLUSTRATIVE CASE

A 47-year-old man in generally good health presents to a family medicine clinic for a well visit. He does not use tobacco products and had a benign colonoscopy last year. He reports walking for 30 minutes 3 to 4 times per week for exercise, althoug h he has gained 3 lbs over the past 2 years. He has no family history of early coronary artery disease, but his father and older brother have hypertension. His mother has a history of diabetes and hyperlipidemia.

The patient’s physical exam is unremarkable except for an elevated BP reading of 151/82 mm Hg. A review of his chart indicates he has had multiple elevated readings in the past that have ranged from 132/72 mm Hg to 139/89 mm Hg. The patient is interested in antihypertensive treatment but wants to know if modifying his diet and replacing his regular table salt with a salt substitute will lower his high BP. What can you recommend?

Hypertension is a leading cause of CV morbidity and mortality worldwide and is linked to increased dietary sodium intake. An estimated 1.28 billion people worldwide have hypertension; however, more than half of cases are undiagnosed.² The US Preventive Services Task Force recommends screening for hypertension in adults older than 18 years and confirming elevated measurements conducted in a nonclinical setting before starting medication (grade “A”).³

Cut-points for the diagnosis of hypertension vary. The American Academy of Family Physicians, ⁴ the Eighth Joint National Committee (JNC 8), ⁵ the International Society of Hypertension, ⁶ and the European Society of Cardiology ⁷ use ≥ 140 mm Hg systolic BP (SBP) or ≥ 90 mm Hg diastolic BP (DBP) to define hypertension. The American College of Cardiology/American Heart Association guidelines use ≥ 130/80 mm Hg. ⁸

When treating patients with hypertension, primary care physicians often recommend lifestyle modifications such as the Dietary Approaches to Stop Hypertension (DASH) diet. Other lifestyle modifications include weight loss, tobacco cessation, reduced daily alcohol intake, and increased physical activity. ⁹

Systematic reviews have shown a measurable improvement in BP with sodium reduction and potassium substitution. ^10-12 More importantly, high-quality evidence demonstrates a decreased risk for CV disease, kidney disease, and all-cause mortality with lower dietary sodium intake. ¹³ Previous studies have shown that potassium-enriched salt substitutes lower BP, but their impact on CV morbidity and mortality is not well defined. Although lowering BP is associated with improved clinical impact, there is a lack of ­patient-oriented evidence that demonstrates improvement in CV disease and mortality.

The Salt Substitute and Stroke Study (SSaSS), published in 2021, demonstrated the protective effect of salt substitution against stroke, other CV events, and death. ¹⁴ Furthermore, this 5-year, cluster-randomized controlled trial of 20,995 participants across 600 villages in China demonstrated reduced CV mortality and BP reduction similar to standard pharmacologic treatment. Prior to SSaSS, 17 randomized controlled trials demonstrated a BP-lowering effect of salt substitutes but did not directly study the impact on clinical outcomes. ¹³

Continue to: In this 2022 systematic review...

In this 2022 systematic review and meta-analysis, ¹ Yin et al evaluated 21 trials, including SSaSS, for the effect of salt substitutes on BP and other clinical outcomes, and the generalizability of the study results to diverse populations. The systematic review included parallel-group, step-wedge, and cluster-­randomized controlled trials reporting the effect of salt substitutes on BP or clinical outcomes.

STUDY SUMMARY

Salt substitutes reduced BP across diverse populations

This systematic review and meta-analysis reviewed existing literature for randomized controlled trials investigating the effects of ­potassium-enriched salt substitutes on clinical outcomes for patients without kidney disease. The most commonly used salt substitute was potassium chloride, at 25% to 65% potassium.

The systematic review identified 21 trials comprising 31,949 study participants from 15 different countries with 1 to 60 months’ duration. Meta-analyses were performed using 19 trials for BP outcomes and 5 trials for vascular outcomes. Eleven trials were rated as having low risk for bias, 8 were deemed to have some concern, and 2 were rated as high risk for bias. Comparisons of data excluding studies with high risk for bias yielded results similar to comparisons of all studies.

The meta-analysis of 19 trials demonstrated reduced SBP (–4.6 mm Hg; 95% CI, –6.1 to –3.1) and DBP (–1.6 mm Hg; 95% CI, –2.4 to –0.8) in participants using potassium-enriched salt substitutes. However, the authors noted substantial heterogeneity among the studies (I ² > 70%) for both SBP and DBP outcomes. Although there were no subgroup differences for age, sex, hypertension history, or other biomarkers, outcome differences were associated with trial duration, baseline potassium intake, and composition of the salt substitute.

Consistent reduction in BP and clinical outcomes across diverse populations and regions suggests potential worldwide benefit from the use of potassium-enriched salt in appropriate patients.

Potassium-enriched salt substitutes were associated with reduced total mortality (risk ratio [RR] = 0.89; 95% CI, 0.85-0.94), CV mortality (RR = 0.87; 95% CI, 0.81-0.94), and CV events (RR = 0.89; 95% CI, 0.85-0.94). In a meta-regression, each 10% reduction in the sodium content of the salt substitute was ­associated with a 1.5–mm Hg greater reduction in SBP (95% CI, –3.0 to –0.03) and a 1.0–mm Hg greater reduction in DBP (95% CI, –1.8 to –0.1). However, the authors suggest interpreting meta-regression results with caution.

Continue to: Only 2 of the studes...

Only 2 of the studies in the systematic review explicitly reported the adverse effect of hyperkalemia, and there was no statistical difference in events between randomized groups. Eight other studies reported no serious adverse events related to hyperkalemia , and 11 studies did not report on the risk for hyperkalemia.

WHAT’S NEW

High-quality data demonstrate beneficial outcomes

Previous observational and interventional studies demonstrated a BP-lowering effect of salt substitutes, but limited data with poor-quality evidence existed for the impact of salt substitutes on clinical outcomes such as mortality and CV events. This systematic review and meta-analysis suggests that ­potassium-supplemented salt may reduce BP and secondarily reduce the risk for CV events, CV mortality, and total mortality, without clear harmful effects reported.

CAVEATS

Some patient populations, comorbidities excluded from study

The study did not include patients with kidney disease or those taking potassium-sparing diuretics. Furthermore, the available data do not include primary prevention participants.

Although BP reduction due to salt substitutes may be small at an individual level, these levels of reduction may be important at a population level.

Subgroup analyses should be interpreted with caution due to the small number of trials available for individual subgroups. In addition, funnel plot asymmetry for studies reporting DBP suggests at least some effect of publication bias for that outcome.

Although BP reduction due to salt substitutes may be small at an individual level, these levels of reduction may be important at a population level.

CHALLENGES TO IMPLEMENTATION

For appropriate patients, no challenges anticipated

There are no significant challenges to implementing conclusions from this study in the primary care setting. Family physicians should be able to recommend potassium-enriched salt substitutes to patients with hypertension who are not at risk for hyperkalemia, including those with kidney disease, on potassium-­sparing diuretics, or with a history of hyperkalemia/hyperkalemic conditions. Salt substitutes, including potassium-enriched salts, are readily available in stores.

ILLUSTRATIVE CASE

A 47-year-old man in generally good health presents to a family medicine clinic for a well visit. He does not use tobacco products and had a benign colonoscopy last year. He reports walking for 30 minutes 3 to 4 times per week for exercise, althoug h he has gained 3 lbs over the past 2 years. He has no family history of early coronary artery disease, but his father and older brother have hypertension. His mother has a history of diabetes and hyperlipidemia.

The patient’s physical exam is unremarkable except for an elevated BP reading of 151/82 mm Hg. A review of his chart indicates he has had multiple elevated readings in the past that have ranged from 132/72 mm Hg to 139/89 mm Hg. The patient is interested in antihypertensive treatment but wants to know if modifying his diet and replacing his regular table salt with a salt substitute will lower his high BP. What can you recommend?

Hypertension is a leading cause of CV morbidity and mortality worldwide and is linked to increased dietary sodium intake. An estimated 1.28 billion people worldwide have hypertension; however, more than half of cases are undiagnosed.² The US Preventive Services Task Force recommends screening for hypertension in adults older than 18 years and confirming elevated measurements conducted in a nonclinical setting before starting medication (grade “A”).³

Cut-points for the diagnosis of hypertension vary. The American Academy of Family Physicians, ⁴ the Eighth Joint National Committee (JNC 8), ⁵ the International Society of Hypertension, ⁶ and the European Society of Cardiology ⁷ use ≥ 140 mm Hg systolic BP (SBP) or ≥ 90 mm Hg diastolic BP (DBP) to define hypertension. The American College of Cardiology/American Heart Association guidelines use ≥ 130/80 mm Hg. ⁸

When treating patients with hypertension, primary care physicians often recommend lifestyle modifications such as the Dietary Approaches to Stop Hypertension (DASH) diet. Other lifestyle modifications include weight loss, tobacco cessation, reduced daily alcohol intake, and increased physical activity. ⁹

Systematic reviews have shown a measurable improvement in BP with sodium reduction and potassium substitution. ^10-12 More importantly, high-quality evidence demonstrates a decreased risk for CV disease, kidney disease, and all-cause mortality with lower dietary sodium intake. ¹³ Previous studies have shown that potassium-enriched salt substitutes lower BP, but their impact on CV morbidity and mortality is not well defined. Although lowering BP is associated with improved clinical impact, there is a lack of ­patient-oriented evidence that demonstrates improvement in CV disease and mortality.

The Salt Substitute and Stroke Study (SSaSS), published in 2021, demonstrated the protective effect of salt substitution against stroke, other CV events, and death. ¹⁴ Furthermore, this 5-year, cluster-randomized controlled trial of 20,995 participants across 600 villages in China demonstrated reduced CV mortality and BP reduction similar to standard pharmacologic treatment. Prior to SSaSS, 17 randomized controlled trials demonstrated a BP-lowering effect of salt substitutes but did not directly study the impact on clinical outcomes. ¹³

Continue to: In this 2022 systematic review...

In this 2022 systematic review and meta-analysis, ¹ Yin et al evaluated 21 trials, including SSaSS, for the effect of salt substitutes on BP and other clinical outcomes, and the generalizability of the study results to diverse populations. The systematic review included parallel-group, step-wedge, and cluster-­randomized controlled trials reporting the effect of salt substitutes on BP or clinical outcomes.

STUDY SUMMARY

Salt substitutes reduced BP across diverse populations

This systematic review and meta-analysis reviewed existing literature for randomized controlled trials investigating the effects of ­potassium-enriched salt substitutes on clinical outcomes for patients without kidney disease. The most commonly used salt substitute was potassium chloride, at 25% to 65% potassium.

The systematic review identified 21 trials comprising 31,949 study participants from 15 different countries with 1 to 60 months’ duration. Meta-analyses were performed using 19 trials for BP outcomes and 5 trials for vascular outcomes. Eleven trials were rated as having low risk for bias, 8 were deemed to have some concern, and 2 were rated as high risk for bias. Comparisons of data excluding studies with high risk for bias yielded results similar to comparisons of all studies.

The meta-analysis of 19 trials demonstrated reduced SBP (–4.6 mm Hg; 95% CI, –6.1 to –3.1) and DBP (–1.6 mm Hg; 95% CI, –2.4 to –0.8) in participants using potassium-enriched salt substitutes. However, the authors noted substantial heterogeneity among the studies (I ² > 70%) for both SBP and DBP outcomes. Although there were no subgroup differences for age, sex, hypertension history, or other biomarkers, outcome differences were associated with trial duration, baseline potassium intake, and composition of the salt substitute.

Consistent reduction in BP and clinical outcomes across diverse populations and regions suggests potential worldwide benefit from the use of potassium-enriched salt in appropriate patients.

Potassium-enriched salt substitutes were associated with reduced total mortality (risk ratio [RR] = 0.89; 95% CI, 0.85-0.94), CV mortality (RR = 0.87; 95% CI, 0.81-0.94), and CV events (RR = 0.89; 95% CI, 0.85-0.94). In a meta-regression, each 10% reduction in the sodium content of the salt substitute was ­associated with a 1.5–mm Hg greater reduction in SBP (95% CI, –3.0 to –0.03) and a 1.0–mm Hg greater reduction in DBP (95% CI, –1.8 to –0.1). However, the authors suggest interpreting meta-regression results with caution.

Continue to: Only 2 of the studes...

Only 2 of the studies in the systematic review explicitly reported the adverse effect of hyperkalemia, and there was no statistical difference in events between randomized groups. Eight other studies reported no serious adverse events related to hyperkalemia , and 11 studies did not report on the risk for hyperkalemia.

WHAT’S NEW

High-quality data demonstrate beneficial outcomes

Previous observational and interventional studies demonstrated a BP-lowering effect of salt substitutes, but limited data with poor-quality evidence existed for the impact of salt substitutes on clinical outcomes such as mortality and CV events. This systematic review and meta-analysis suggests that ­potassium-supplemented salt may reduce BP and secondarily reduce the risk for CV events, CV mortality, and total mortality, without clear harmful effects reported.

CAVEATS

Some patient populations, comorbidities excluded from study

The study did not include patients with kidney disease or those taking potassium-sparing diuretics. Furthermore, the available data do not include primary prevention participants.

Although BP reduction due to salt substitutes may be small at an individual level, these levels of reduction may be important at a population level.

Subgroup analyses should be interpreted with caution due to the small number of trials available for individual subgroups. In addition, funnel plot asymmetry for studies reporting DBP suggests at least some effect of publication bias for that outcome.

Although BP reduction due to salt substitutes may be small at an individual level, these levels of reduction may be important at a population level.

CHALLENGES TO IMPLEMENTATION

For appropriate patients, no challenges anticipated

There are no significant challenges to implementing conclusions from this study in the primary care setting. Family physicians should be able to recommend potassium-enriched salt substitutes to patients with hypertension who are not at risk for hyperkalemia, including those with kidney disease, on potassium-­sparing diuretics, or with a history of hyperkalemia/hyperkalemic conditions. Salt substitutes, including potassium-enriched salts, are readily available in stores.

Citing the strong overlap between heart disease, kidney disease, type 2 diabetes, and obesity, the American Heart Association has for the first time formally defined what they are calling cardiovascular-kidney-metabolic (CKM) syndrome.

“This work was prompted by the fact that CKM syndrome leads to premature morbidity and mortality, primarily because of a higher burden of CVD,” writing committee chair Chiadi Ndumele, MD, PhD, said in an interview.

“While CKM syndrome is a public health emergency, there is also great potential for improving CKM health in the population, with an increasing number of therapies that favorably impact metabolic risk factors, risk for adverse kidney events, or both, which also protect against CVD,” added Dr. Ndumele, director of obesity and cardiometabolic research in the division of cardiology at Johns Hopkins University, Baltimore.

The AHA presidential advisory and accompanying scientific statement, which provides a synopsis of evidence for the science and clinical management of CKM, were published online in the journal Circulation.
 

CKM syndrome staging

According to the AHA, one in three U.S. adults have three or more risk factors that contribute to CVD, metabolic disorders, and/or kidney disease.

In addition to defining CKM syndrome, the advisory provides a “staging construct, to be used in both adults and youth, that reflects the progressive pathophysiology and risk within CKM syndrome, with therapeutic guidance tied to CKM stages,” Dr. Ndumele told this news organization.

The AHA outlines four stages of CKM syndrome:

Stage 0: At this stage, no CKM risk factors are present, and the goal is to prevent CKM syndrome (particularly unhealthy weight gain) by achieving and maintaining ideal health based on the AHA’s Life’s Essential 8 recommendations. Adults in this stage should be screened every 3-5 years to assess lipids, blood pressure, and blood sugar.

Stage 1: At this stage, excess weight, abdominal obesity, or dysfunctional adipose tissue (clinically manifest as impaired glucose tolerance or prediabetes) is present without other metabolic risk factors or CVD. Management includes providing support for healthy lifestyle changes (healthy eating and regular physical activity), with a goal of at least 5% weight loss and addressing glucose intolerance if needed. Screening adults with stage 1 CKM every 2-3 years is advised to assess blood pressure, triglycerides, cholesterol, and blood sugar.

Stage 2: At this stage, metabolic risk factors (hypertriglyceridemia, hypertension, metabolic syndrome, diabetes) and kidney disease are present. The goal is to address risk factors to prevent progression to CVD and kidney failure. Screening for stage 2 CKM syndrome aligns with AHA/ACC guidelines, which include yearly assessment of blood pressure, triglycerides, cholesterol, blood sugar, and kidney function. More frequent kidney screening is recommended for individuals with increased risk of kidney failure based on kidney function assessments.

Stage 3: This stage describes individuals with subclinical CVD with metabolic risk factors or kidney disease or those at high predicted risk for CVD. The goal is to intensify efforts to prevent progression to symptomatic CVD and kidney failure. This may involve increasing or changing medications, and additional focus on lifestyle changes. Coronary artery calcium (CAC) measurement in some adults is recommended to assess narrowing of the arteries when treatment decisions are unclear.

Stage 4: Individuals with stage 4 CKM syndrome have symptomatic CVD, excess body fat, metabolic risk factors, or kidney disease. Stage 4 CKM syndrome is divided into two subcategories: (4a) no kidney failure and (4b) kidney failure. In this stage, patients may have already had a myocardial infarction (MI) or stroke or may already have heart failure. They also may have additional CV conditions such as peripheral artery disease or atrial fibrillation. The goal of care is individualized treatment for CVD with consideration for CKM syndrome conditions.

The advisory also describes CKM syndrome regression, “an important concept and public health message in which people making healthy lifestyle changes and achieving weight loss may regress to lower CKM syndrome stages and a better state of health,” the AHA says in a news release.

They note that a “critical” next step is to update the pooled cohort equation (PCE) risk prediction algorithm to include measures of kidney function, type 2 diabetes control, and social determinants of health for a more comprehensive risk estimate.

The advisory also recommends risk calculator updates be expanded to assess risk in people as young as age 30 and to calculate both 10- and 30-year CVD risk.

“Clearly defining the patient with CKM syndrome, and providing new approaches for CKM syndrome staging and risk prediction, will help health care professionals to identify these individuals earlier and to provide timely, holistic, and patient-centered care,” Dr. Ndumele said.

This presidential advisory was prepared by the volunteer writing group on behalf of the AHA . The authors have reported no relevant financial relationships.

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

Citing the strong overlap between heart disease, kidney disease, type 2 diabetes, and obesity, the American Heart Association has for the first time formally defined what they are calling cardiovascular-kidney-metabolic (CKM) syndrome.

“This work was prompted by the fact that CKM syndrome leads to premature morbidity and mortality, primarily because of a higher burden of CVD,” writing committee chair Chiadi Ndumele, MD, PhD, said in an interview.

“While CKM syndrome is a public health emergency, there is also great potential for improving CKM health in the population, with an increasing number of therapies that favorably impact metabolic risk factors, risk for adverse kidney events, or both, which also protect against CVD,” added Dr. Ndumele, director of obesity and cardiometabolic research in the division of cardiology at Johns Hopkins University, Baltimore.

The AHA presidential advisory and accompanying scientific statement, which provides a synopsis of evidence for the science and clinical management of CKM, were published online in the journal Circulation.
 

CKM syndrome staging

According to the AHA, one in three U.S. adults have three or more risk factors that contribute to CVD, metabolic disorders, and/or kidney disease.

In addition to defining CKM syndrome, the advisory provides a “staging construct, to be used in both adults and youth, that reflects the progressive pathophysiology and risk within CKM syndrome, with therapeutic guidance tied to CKM stages,” Dr. Ndumele told this news organization.

The AHA outlines four stages of CKM syndrome:

Stage 0: At this stage, no CKM risk factors are present, and the goal is to prevent CKM syndrome (particularly unhealthy weight gain) by achieving and maintaining ideal health based on the AHA’s Life’s Essential 8 recommendations. Adults in this stage should be screened every 3-5 years to assess lipids, blood pressure, and blood sugar.

Stage 1: At this stage, excess weight, abdominal obesity, or dysfunctional adipose tissue (clinically manifest as impaired glucose tolerance or prediabetes) is present without other metabolic risk factors or CVD. Management includes providing support for healthy lifestyle changes (healthy eating and regular physical activity), with a goal of at least 5% weight loss and addressing glucose intolerance if needed. Screening adults with stage 1 CKM every 2-3 years is advised to assess blood pressure, triglycerides, cholesterol, and blood sugar.

Stage 2: At this stage, metabolic risk factors (hypertriglyceridemia, hypertension, metabolic syndrome, diabetes) and kidney disease are present. The goal is to address risk factors to prevent progression to CVD and kidney failure. Screening for stage 2 CKM syndrome aligns with AHA/ACC guidelines, which include yearly assessment of blood pressure, triglycerides, cholesterol, blood sugar, and kidney function. More frequent kidney screening is recommended for individuals with increased risk of kidney failure based on kidney function assessments.

Stage 3: This stage describes individuals with subclinical CVD with metabolic risk factors or kidney disease or those at high predicted risk for CVD. The goal is to intensify efforts to prevent progression to symptomatic CVD and kidney failure. This may involve increasing or changing medications, and additional focus on lifestyle changes. Coronary artery calcium (CAC) measurement in some adults is recommended to assess narrowing of the arteries when treatment decisions are unclear.

Stage 4: Individuals with stage 4 CKM syndrome have symptomatic CVD, excess body fat, metabolic risk factors, or kidney disease. Stage 4 CKM syndrome is divided into two subcategories: (4a) no kidney failure and (4b) kidney failure. In this stage, patients may have already had a myocardial infarction (MI) or stroke or may already have heart failure. They also may have additional CV conditions such as peripheral artery disease or atrial fibrillation. The goal of care is individualized treatment for CVD with consideration for CKM syndrome conditions.

The advisory also describes CKM syndrome regression, “an important concept and public health message in which people making healthy lifestyle changes and achieving weight loss may regress to lower CKM syndrome stages and a better state of health,” the AHA says in a news release.

They note that a “critical” next step is to update the pooled cohort equation (PCE) risk prediction algorithm to include measures of kidney function, type 2 diabetes control, and social determinants of health for a more comprehensive risk estimate.

The advisory also recommends risk calculator updates be expanded to assess risk in people as young as age 30 and to calculate both 10- and 30-year CVD risk.

“Clearly defining the patient with CKM syndrome, and providing new approaches for CKM syndrome staging and risk prediction, will help health care professionals to identify these individuals earlier and to provide timely, holistic, and patient-centered care,” Dr. Ndumele said.

This presidential advisory was prepared by the volunteer writing group on behalf of the AHA . The authors have reported no relevant financial relationships.

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

Citing the strong overlap between heart disease, kidney disease, type 2 diabetes, and obesity, the American Heart Association has for the first time formally defined what they are calling cardiovascular-kidney-metabolic (CKM) syndrome.

“This work was prompted by the fact that CKM syndrome leads to premature morbidity and mortality, primarily because of a higher burden of CVD,” writing committee chair Chiadi Ndumele, MD, PhD, said in an interview.

“While CKM syndrome is a public health emergency, there is also great potential for improving CKM health in the population, with an increasing number of therapies that favorably impact metabolic risk factors, risk for adverse kidney events, or both, which also protect against CVD,” added Dr. Ndumele, director of obesity and cardiometabolic research in the division of cardiology at Johns Hopkins University, Baltimore.

The AHA presidential advisory and accompanying scientific statement, which provides a synopsis of evidence for the science and clinical management of CKM, were published online in the journal Circulation.
 

CKM syndrome staging

According to the AHA, one in three U.S. adults have three or more risk factors that contribute to CVD, metabolic disorders, and/or kidney disease.

In addition to defining CKM syndrome, the advisory provides a “staging construct, to be used in both adults and youth, that reflects the progressive pathophysiology and risk within CKM syndrome, with therapeutic guidance tied to CKM stages,” Dr. Ndumele told this news organization.

The AHA outlines four stages of CKM syndrome:

Stage 0: At this stage, no CKM risk factors are present, and the goal is to prevent CKM syndrome (particularly unhealthy weight gain) by achieving and maintaining ideal health based on the AHA’s Life’s Essential 8 recommendations. Adults in this stage should be screened every 3-5 years to assess lipids, blood pressure, and blood sugar.

Stage 1: At this stage, excess weight, abdominal obesity, or dysfunctional adipose tissue (clinically manifest as impaired glucose tolerance or prediabetes) is present without other metabolic risk factors or CVD. Management includes providing support for healthy lifestyle changes (healthy eating and regular physical activity), with a goal of at least 5% weight loss and addressing glucose intolerance if needed. Screening adults with stage 1 CKM every 2-3 years is advised to assess blood pressure, triglycerides, cholesterol, and blood sugar.

Stage 2: At this stage, metabolic risk factors (hypertriglyceridemia, hypertension, metabolic syndrome, diabetes) and kidney disease are present. The goal is to address risk factors to prevent progression to CVD and kidney failure. Screening for stage 2 CKM syndrome aligns with AHA/ACC guidelines, which include yearly assessment of blood pressure, triglycerides, cholesterol, blood sugar, and kidney function. More frequent kidney screening is recommended for individuals with increased risk of kidney failure based on kidney function assessments.

Stage 3: This stage describes individuals with subclinical CVD with metabolic risk factors or kidney disease or those at high predicted risk for CVD. The goal is to intensify efforts to prevent progression to symptomatic CVD and kidney failure. This may involve increasing or changing medications, and additional focus on lifestyle changes. Coronary artery calcium (CAC) measurement in some adults is recommended to assess narrowing of the arteries when treatment decisions are unclear.

Stage 4: Individuals with stage 4 CKM syndrome have symptomatic CVD, excess body fat, metabolic risk factors, or kidney disease. Stage 4 CKM syndrome is divided into two subcategories: (4a) no kidney failure and (4b) kidney failure. In this stage, patients may have already had a myocardial infarction (MI) or stroke or may already have heart failure. They also may have additional CV conditions such as peripheral artery disease or atrial fibrillation. The goal of care is individualized treatment for CVD with consideration for CKM syndrome conditions.

The advisory also describes CKM syndrome regression, “an important concept and public health message in which people making healthy lifestyle changes and achieving weight loss may regress to lower CKM syndrome stages and a better state of health,” the AHA says in a news release.

They note that a “critical” next step is to update the pooled cohort equation (PCE) risk prediction algorithm to include measures of kidney function, type 2 diabetes control, and social determinants of health for a more comprehensive risk estimate.

The advisory also recommends risk calculator updates be expanded to assess risk in people as young as age 30 and to calculate both 10- and 30-year CVD risk.

“Clearly defining the patient with CKM syndrome, and providing new approaches for CKM syndrome staging and risk prediction, will help health care professionals to identify these individuals earlier and to provide timely, holistic, and patient-centered care,” Dr. Ndumele said.

This presidential advisory was prepared by the volunteer writing group on behalf of the AHA . The authors have reported no relevant financial relationships.

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

TOPLINE:

Compared with supervised treadmill workouts at a gym, which is considered first-line therapy for walking impairment in lower extremity peripheral artery disease (PAD), exercising at home significantly improves 6-minute walking (6MW) distance, but not maximal treadmill walking distance, results of a new meta-analysis show.

METHODOLOGY:

• The analysis included five randomized clinical trials with a total of 719 participants, mean age 68.6 years, all led by researchers at Northwestern University, Chicago, that compared either supervised treadmill or home-based walking exercise with a nonexercise control group in people with PAD (defined as Ankle Brachial Index ≤ 0.90).
• All trials measured 6-minute walk (6MW) distance (walking as far as possible in 6 minutes), treadmill walking performance, and outcomes from the Walking Impairment Questionnaire (WIQ), which includes distance, walking speed, and stair-climbing domains, at baseline and at 6 months.
• Supervised treadmill exercise interventions included three individualized exercise sessions per week with an exercise physiologist at an exercise center, and home-based exercises involved walking near home 5 days per week, both for up to 50 minutes per session.

TAKEAWAY:

• After adjusting for study, age, sex, race, smoking, history of myocardial infarction, heart failure, and baseline 6MW distance, the study found both exercise interventions were better than nonexercise controls for 6MW distance.
• Compared with supervised treadmill exercise, home-based walking was associated with significantly improved mean 6MW distance (31.8 m vs. 55.6 m; adjusted between-group difference: −23.8 m; 95% confidence interval, −44.0 to −3.6; P = .021), and significantly improved WIQ walking speed score.
• However, home-based walking was associated with significantly less improvement in maximal treadmill walking distance, compared with supervised treadmill exercise (adjusted between-group difference: 132.5 m; 95% CI, 72.1-192.9; P < .001).

IN PRACTICE:

Home-based walking exercise “circumvents” barriers to accessing supervised exercise such as having to travel to a facility, said the authors, who noted the new data “demonstrated a large and consistent effect of home-based walking exercise on improved 6MW distance and also significantly improved the WIQ walking speed score, compared with supervised treadmill exercise.”

SOURCE:

The study was conducted by Neela D. Thangada, MD, Northwestern University, Chicago, and colleagues. It was published online in JAMA Network Open.

LIMITATIONS:

Data were combined from different randomized clinical trials that were led by one investigative team, and reported comparisons were not prespecified. Comparisons between supervised and home-based exercise lacked statistical power for the WIQ distance and stair-climbing measures.

DISCLOSURES:

The study was sponsored by the National Center for Research Resources and the National Heart, Lung, and Blood Institute of the National Institutes of Health. Dr. Thangada reports no relevant financial relationships. Disclosures for study coauthors can be found with the original article.

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

TOPLINE:

Compared with supervised treadmill workouts at a gym, which is considered first-line therapy for walking impairment in lower extremity peripheral artery disease (PAD), exercising at home significantly improves 6-minute walking (6MW) distance, but not maximal treadmill walking distance, results of a new meta-analysis show.

METHODOLOGY:

• The analysis included five randomized clinical trials with a total of 719 participants, mean age 68.6 years, all led by researchers at Northwestern University, Chicago, that compared either supervised treadmill or home-based walking exercise with a nonexercise control group in people with PAD (defined as Ankle Brachial Index ≤ 0.90).
• All trials measured 6-minute walk (6MW) distance (walking as far as possible in 6 minutes), treadmill walking performance, and outcomes from the Walking Impairment Questionnaire (WIQ), which includes distance, walking speed, and stair-climbing domains, at baseline and at 6 months.
• Supervised treadmill exercise interventions included three individualized exercise sessions per week with an exercise physiologist at an exercise center, and home-based exercises involved walking near home 5 days per week, both for up to 50 minutes per session.

TAKEAWAY:

• After adjusting for study, age, sex, race, smoking, history of myocardial infarction, heart failure, and baseline 6MW distance, the study found both exercise interventions were better than nonexercise controls for 6MW distance.
• Compared with supervised treadmill exercise, home-based walking was associated with significantly improved mean 6MW distance (31.8 m vs. 55.6 m; adjusted between-group difference: −23.8 m; 95% confidence interval, −44.0 to −3.6; P = .021), and significantly improved WIQ walking speed score.
• However, home-based walking was associated with significantly less improvement in maximal treadmill walking distance, compared with supervised treadmill exercise (adjusted between-group difference: 132.5 m; 95% CI, 72.1-192.9; P < .001).

IN PRACTICE:

Home-based walking exercise “circumvents” barriers to accessing supervised exercise such as having to travel to a facility, said the authors, who noted the new data “demonstrated a large and consistent effect of home-based walking exercise on improved 6MW distance and also significantly improved the WIQ walking speed score, compared with supervised treadmill exercise.”

SOURCE:

The study was conducted by Neela D. Thangada, MD, Northwestern University, Chicago, and colleagues. It was published online in JAMA Network Open.

LIMITATIONS:

Data were combined from different randomized clinical trials that were led by one investigative team, and reported comparisons were not prespecified. Comparisons between supervised and home-based exercise lacked statistical power for the WIQ distance and stair-climbing measures.

DISCLOSURES:

The study was sponsored by the National Center for Research Resources and the National Heart, Lung, and Blood Institute of the National Institutes of Health. Dr. Thangada reports no relevant financial relationships. Disclosures for study coauthors can be found with the original article.

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

TOPLINE:

Compared with supervised treadmill workouts at a gym, which is considered first-line therapy for walking impairment in lower extremity peripheral artery disease (PAD), exercising at home significantly improves 6-minute walking (6MW) distance, but not maximal treadmill walking distance, results of a new meta-analysis show.

METHODOLOGY:

• The analysis included five randomized clinical trials with a total of 719 participants, mean age 68.6 years, all led by researchers at Northwestern University, Chicago, that compared either supervised treadmill or home-based walking exercise with a nonexercise control group in people with PAD (defined as Ankle Brachial Index ≤ 0.90).
• All trials measured 6-minute walk (6MW) distance (walking as far as possible in 6 minutes), treadmill walking performance, and outcomes from the Walking Impairment Questionnaire (WIQ), which includes distance, walking speed, and stair-climbing domains, at baseline and at 6 months.
• Supervised treadmill exercise interventions included three individualized exercise sessions per week with an exercise physiologist at an exercise center, and home-based exercises involved walking near home 5 days per week, both for up to 50 minutes per session.

TAKEAWAY:

• After adjusting for study, age, sex, race, smoking, history of myocardial infarction, heart failure, and baseline 6MW distance, the study found both exercise interventions were better than nonexercise controls for 6MW distance.
• Compared with supervised treadmill exercise, home-based walking was associated with significantly improved mean 6MW distance (31.8 m vs. 55.6 m; adjusted between-group difference: −23.8 m; 95% confidence interval, −44.0 to −3.6; P = .021), and significantly improved WIQ walking speed score.
• However, home-based walking was associated with significantly less improvement in maximal treadmill walking distance, compared with supervised treadmill exercise (adjusted between-group difference: 132.5 m; 95% CI, 72.1-192.9; P < .001).

IN PRACTICE:

Home-based walking exercise “circumvents” barriers to accessing supervised exercise such as having to travel to a facility, said the authors, who noted the new data “demonstrated a large and consistent effect of home-based walking exercise on improved 6MW distance and also significantly improved the WIQ walking speed score, compared with supervised treadmill exercise.”

SOURCE:

The study was conducted by Neela D. Thangada, MD, Northwestern University, Chicago, and colleagues. It was published online in JAMA Network Open.

LIMITATIONS:

Data were combined from different randomized clinical trials that were led by one investigative team, and reported comparisons were not prespecified. Comparisons between supervised and home-based exercise lacked statistical power for the WIQ distance and stair-climbing measures.

DISCLOSURES:

The study was sponsored by the National Center for Research Resources and the National Heart, Lung, and Blood Institute of the National Institutes of Health. Dr. Thangada reports no relevant financial relationships. Disclosures for study coauthors can be found with the original article.

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

Lead is significantly more harmful to the health of children and adults across the world than previously thought. This conclusion is suggested by a modeling study presented by Norwegian development economist Bjorn Larsen and the Colombian environmental specialist for lead Ernesto Sánchez-Triana, PhD, in a presentation to the World Bank. Their work was published in The Lancet Planetary Health.

As Mr. Larsen and Mr. Sánchez-Triana report, the economic consequences of increased exposure to lead are already immense, especially in low- and middle-income countries (LMICs). The study was financed by the Korea Green Growth Trust Fund and the World Bank’s Pollution Management and Environmental Health Program.
 

Intellectual, cardiovascular effects

“It is a very important publication that affects all of us,” pediatrician Stephan Böse-O’Reilly, MD, of the Institute and Polyclinic for Occupational, Social, and Environmental Health at Ludwig Maximilian University Hospital in Munich, Germany, said in an interview. “The study, the results of which I think are very reliable, shows that elevated levels of lead in the blood have a much more drastic effect on children’s intelligence than we previously thought.”

It is well known that lead affects the antenatal and postnatal cognitive development of children, Dr. Böse-O’Reilly explained. But the extent of this effect has quite clearly been underestimated before now.

On the other hand, Mr. Larsen and Mr. Sánchez-Triana’s work could prove that lead may lead to more cardiovascular diseases in adulthood. “We already knew that increased exposure to lead increased the risk of high blood pressure and, as a result, mortality,” said Dr. Böse-O’Reilly. “This study now very clearly shows that the risk of arteriosclerosis, for example, also increases through lead exposure.”
 

Figures from 2019

“For the first time, to our knowledge, we aimed to estimate the global burden and cost of IQ loss and cardiovascular disease mortality from lead exposure,” wrote Mr. Larsen and Mr. Sánchez-Triana. For their calculations, the scientists used blood lead level estimates from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019.

They estimated IQ loss in children younger than 5 years using the internationally recognized blood lead level–IQ loss function. The researchers subsequently estimated the cost of this IQ loss based on the loss in lifetime income, presented as cost in U.S. dollars and percentage of gross domestic product (GDP).

Mr. Larsen and Mr. Sánchez-Triana estimated cardiovascular deaths caused by lead exposure in adults aged 25 years or older using a model that captures the effects of lead exposure on cardiovascular disease mortality that is mediated through mechanisms other than hypertension.

Finally, they used the statistical life expectancy to estimate the welfare cost of premature mortality, also presented as cost in U.S. dollars and percentage of GDP. All estimates were calculated according to the World Bank income classification for 2019.
 

Millions of deaths

As reported by Mr. Larsen and Mr. Sánchez-Triana, children younger than 5 years lost an estimated 765 million IQ points worldwide because of lead exposure in this period. In 2019, 5,545,000 adults died from cardiovascular diseases caused by lead exposure. The scientists recorded 729 million of the IQ points lost (95.3%) and 5,004,000 (90.2%) of the deaths as occurring in LMICs.

The IQ loss here was nearly 80% higher than a previous estimate, wrote Mr. Larsen and Mr. Sánchez-Triana. The number of cardiovascular disease deaths they determined was six times higher than the GBD 2019 estimate.

“These are results with which the expert societies, especially the German Society of Pediatrics and Adolescent Medicine and the German Cardiac Society, and the corresponding professional associations need to concern themselves,” said Dr. Böse-O’Reilly.

Although blood lead concentrations have declined substantially since the phase-out of leaded gasoline, especially in Western countries, lead still represents a major health issue because it stays in the bones for decades.

European situation moderate

“We need a broad discussion on questions such as whether lead levels should be included in prophylactic assessments in certain age groups, what blood level is even tolerable, and in what situation medicinal therapy with chelating agents would possibly be appropriate,” said Dr. Böse-O’Reilly.

“Of course, we cannot answer these questions on the basis of one individual study,” he added. “However, the work in question definitely illustrates how dangerous lead can be and that we need further research into the actual burden and the best preventive measures.”

In this respect, the situation in Europe is still comparatively moderate. “Globally, lead exposure has risen in recent years,” said Dr. Böse-O’Reilly. According to an investigation by the Planet Earth Foundation, outside of the European Union, lead can increasingly be found in toys, spices, and cooking utensils, for example.

“Especially in lower-income countries, there is a lack of consumer protection or a good monitoring program like we have here in the EU,” said Dr. Böse-O’Reilly. In these countries, lead is sometimes added to spices by unscrupulous retailers to make the color more intense or to simply add to its weight to gain more profit.

Recycling lead-acid batteries or other electrical waste, often transferred to poorer countries, constitutes a large problem. “In general, children in Germany have a blood lead level of less than 1 mcg/dL,” explained Dr. Böse-O’Reilly. “In some regions of Indonesia, where these recycling factories are located, more than 50% of children have levels of more than 20 mcg/dL.”
 

Particulate matter

According to Mr. Larsen and Mr. Sánchez-Triana, the global cost of increased lead exposure was around $6 trillion USD in 2019, which was equivalent to 6.9% of global GDP. About 77% of the cost ($4.62 trillion USD) comprised the welfare costs of cardiovascular disease mortality, and 23% ($1.38 trillion USD) comprised the present value of future income losses because of IQ loss in children.

“Our findings suggest that global lead exposure has health and economic costs on par with PM2.5 air pollution,” wrote the authors. This places lead as an environmental risk factor on par with particulate matter and above that of air pollution from solid fuels, ahead of unsafe drinking water, unhygienic sanitation, or insufficient handwashing.

“This finding is in contrast to that of GBD 2019, which ranked lead exposure as a distant fourth environmental risk factor, due to not accounting for IQ loss in children – other than idiopathic developmental intellectual disability in a small subset of children – and reporting a substantially lower estimate of adult cardiovascular disease mortality,” wrote Mr. Larsen and Mr. Sánchez-Triana.

“A central implication for future research and policy is that LMICs bear an extraordinarily large share of the health and cost burden of lead exposure,” wrote the authors. Consequently, improved quality of blood lead level measurements and identification of sources containing lead are urgently needed there.
 

Improved recycling methods

Dr. Böse-O’Reilly would like an increased focus on children. “If children’s cognitive skills are lost, this of course has a long-term effect on a country’s economic position,” he said. “Precisely that which LMICs actually need for their development is being stripped from them.

“We should think long and hard about whether we really need to send so much of our electrical waste and so many old cars to poorer countries, where they are incorrectly recycled,” he warned. “We should at least give the LMICs the support necessary for them to be able to process lead-containing products in the future so that less lead makes it into the environment.

“Through these global cycles, we all contribute a lot toward the worldwide lead burden,” Dr. Böse-O’Reilly said. “In my opinion, the German Supply Chain Act is therefore definitely sensible. Not only does it protect our own economy, but it also protects the health of people in other countries.”

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

Lead is significantly more harmful to the health of children and adults across the world than previously thought. This conclusion is suggested by a modeling study presented by Norwegian development economist Bjorn Larsen and the Colombian environmental specialist for lead Ernesto Sánchez-Triana, PhD, in a presentation to the World Bank. Their work was published in The Lancet Planetary Health.

As Mr. Larsen and Mr. Sánchez-Triana report, the economic consequences of increased exposure to lead are already immense, especially in low- and middle-income countries (LMICs). The study was financed by the Korea Green Growth Trust Fund and the World Bank’s Pollution Management and Environmental Health Program.
 

Intellectual, cardiovascular effects

“It is a very important publication that affects all of us,” pediatrician Stephan Böse-O’Reilly, MD, of the Institute and Polyclinic for Occupational, Social, and Environmental Health at Ludwig Maximilian University Hospital in Munich, Germany, said in an interview. “The study, the results of which I think are very reliable, shows that elevated levels of lead in the blood have a much more drastic effect on children’s intelligence than we previously thought.”

It is well known that lead affects the antenatal and postnatal cognitive development of children, Dr. Böse-O’Reilly explained. But the extent of this effect has quite clearly been underestimated before now.

On the other hand, Mr. Larsen and Mr. Sánchez-Triana’s work could prove that lead may lead to more cardiovascular diseases in adulthood. “We already knew that increased exposure to lead increased the risk of high blood pressure and, as a result, mortality,” said Dr. Böse-O’Reilly. “This study now very clearly shows that the risk of arteriosclerosis, for example, also increases through lead exposure.”
 

Figures from 2019

“For the first time, to our knowledge, we aimed to estimate the global burden and cost of IQ loss and cardiovascular disease mortality from lead exposure,” wrote Mr. Larsen and Mr. Sánchez-Triana. For their calculations, the scientists used blood lead level estimates from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019.

They estimated IQ loss in children younger than 5 years using the internationally recognized blood lead level–IQ loss function. The researchers subsequently estimated the cost of this IQ loss based on the loss in lifetime income, presented as cost in U.S. dollars and percentage of gross domestic product (GDP).

Mr. Larsen and Mr. Sánchez-Triana estimated cardiovascular deaths caused by lead exposure in adults aged 25 years or older using a model that captures the effects of lead exposure on cardiovascular disease mortality that is mediated through mechanisms other than hypertension.

Finally, they used the statistical life expectancy to estimate the welfare cost of premature mortality, also presented as cost in U.S. dollars and percentage of GDP. All estimates were calculated according to the World Bank income classification for 2019.
 

Millions of deaths

As reported by Mr. Larsen and Mr. Sánchez-Triana, children younger than 5 years lost an estimated 765 million IQ points worldwide because of lead exposure in this period. In 2019, 5,545,000 adults died from cardiovascular diseases caused by lead exposure. The scientists recorded 729 million of the IQ points lost (95.3%) and 5,004,000 (90.2%) of the deaths as occurring in LMICs.

The IQ loss here was nearly 80% higher than a previous estimate, wrote Mr. Larsen and Mr. Sánchez-Triana. The number of cardiovascular disease deaths they determined was six times higher than the GBD 2019 estimate.

“These are results with which the expert societies, especially the German Society of Pediatrics and Adolescent Medicine and the German Cardiac Society, and the corresponding professional associations need to concern themselves,” said Dr. Böse-O’Reilly.

Although blood lead concentrations have declined substantially since the phase-out of leaded gasoline, especially in Western countries, lead still represents a major health issue because it stays in the bones for decades.

European situation moderate

“We need a broad discussion on questions such as whether lead levels should be included in prophylactic assessments in certain age groups, what blood level is even tolerable, and in what situation medicinal therapy with chelating agents would possibly be appropriate,” said Dr. Böse-O’Reilly.

“Of course, we cannot answer these questions on the basis of one individual study,” he added. “However, the work in question definitely illustrates how dangerous lead can be and that we need further research into the actual burden and the best preventive measures.”

In this respect, the situation in Europe is still comparatively moderate. “Globally, lead exposure has risen in recent years,” said Dr. Böse-O’Reilly. According to an investigation by the Planet Earth Foundation, outside of the European Union, lead can increasingly be found in toys, spices, and cooking utensils, for example.

“Especially in lower-income countries, there is a lack of consumer protection or a good monitoring program like we have here in the EU,” said Dr. Böse-O’Reilly. In these countries, lead is sometimes added to spices by unscrupulous retailers to make the color more intense or to simply add to its weight to gain more profit.

Recycling lead-acid batteries or other electrical waste, often transferred to poorer countries, constitutes a large problem. “In general, children in Germany have a blood lead level of less than 1 mcg/dL,” explained Dr. Böse-O’Reilly. “In some regions of Indonesia, where these recycling factories are located, more than 50% of children have levels of more than 20 mcg/dL.”
 

Particulate matter

According to Mr. Larsen and Mr. Sánchez-Triana, the global cost of increased lead exposure was around $6 trillion USD in 2019, which was equivalent to 6.9% of global GDP. About 77% of the cost ($4.62 trillion USD) comprised the welfare costs of cardiovascular disease mortality, and 23% ($1.38 trillion USD) comprised the present value of future income losses because of IQ loss in children.

“Our findings suggest that global lead exposure has health and economic costs on par with PM2.5 air pollution,” wrote the authors. This places lead as an environmental risk factor on par with particulate matter and above that of air pollution from solid fuels, ahead of unsafe drinking water, unhygienic sanitation, or insufficient handwashing.

“This finding is in contrast to that of GBD 2019, which ranked lead exposure as a distant fourth environmental risk factor, due to not accounting for IQ loss in children – other than idiopathic developmental intellectual disability in a small subset of children – and reporting a substantially lower estimate of adult cardiovascular disease mortality,” wrote Mr. Larsen and Mr. Sánchez-Triana.

“A central implication for future research and policy is that LMICs bear an extraordinarily large share of the health and cost burden of lead exposure,” wrote the authors. Consequently, improved quality of blood lead level measurements and identification of sources containing lead are urgently needed there.
 

Improved recycling methods

Dr. Böse-O’Reilly would like an increased focus on children. “If children’s cognitive skills are lost, this of course has a long-term effect on a country’s economic position,” he said. “Precisely that which LMICs actually need for their development is being stripped from them.

“We should think long and hard about whether we really need to send so much of our electrical waste and so many old cars to poorer countries, where they are incorrectly recycled,” he warned. “We should at least give the LMICs the support necessary for them to be able to process lead-containing products in the future so that less lead makes it into the environment.

“Through these global cycles, we all contribute a lot toward the worldwide lead burden,” Dr. Böse-O’Reilly said. “In my opinion, the German Supply Chain Act is therefore definitely sensible. Not only does it protect our own economy, but it also protects the health of people in other countries.”

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

Lead is significantly more harmful to the health of children and adults across the world than previously thought. This conclusion is suggested by a modeling study presented by Norwegian development economist Bjorn Larsen and the Colombian environmental specialist for lead Ernesto Sánchez-Triana, PhD, in a presentation to the World Bank. Their work was published in The Lancet Planetary Health.

As Mr. Larsen and Mr. Sánchez-Triana report, the economic consequences of increased exposure to lead are already immense, especially in low- and middle-income countries (LMICs). The study was financed by the Korea Green Growth Trust Fund and the World Bank’s Pollution Management and Environmental Health Program.
 

Intellectual, cardiovascular effects

“It is a very important publication that affects all of us,” pediatrician Stephan Böse-O’Reilly, MD, of the Institute and Polyclinic for Occupational, Social, and Environmental Health at Ludwig Maximilian University Hospital in Munich, Germany, said in an interview. “The study, the results of which I think are very reliable, shows that elevated levels of lead in the blood have a much more drastic effect on children’s intelligence than we previously thought.”

It is well known that lead affects the antenatal and postnatal cognitive development of children, Dr. Böse-O’Reilly explained. But the extent of this effect has quite clearly been underestimated before now.

On the other hand, Mr. Larsen and Mr. Sánchez-Triana’s work could prove that lead may lead to more cardiovascular diseases in adulthood. “We already knew that increased exposure to lead increased the risk of high blood pressure and, as a result, mortality,” said Dr. Böse-O’Reilly. “This study now very clearly shows that the risk of arteriosclerosis, for example, also increases through lead exposure.”
 

Figures from 2019

“For the first time, to our knowledge, we aimed to estimate the global burden and cost of IQ loss and cardiovascular disease mortality from lead exposure,” wrote Mr. Larsen and Mr. Sánchez-Triana. For their calculations, the scientists used blood lead level estimates from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019.

They estimated IQ loss in children younger than 5 years using the internationally recognized blood lead level–IQ loss function. The researchers subsequently estimated the cost of this IQ loss based on the loss in lifetime income, presented as cost in U.S. dollars and percentage of gross domestic product (GDP).

Mr. Larsen and Mr. Sánchez-Triana estimated cardiovascular deaths caused by lead exposure in adults aged 25 years or older using a model that captures the effects of lead exposure on cardiovascular disease mortality that is mediated through mechanisms other than hypertension.

Finally, they used the statistical life expectancy to estimate the welfare cost of premature mortality, also presented as cost in U.S. dollars and percentage of GDP. All estimates were calculated according to the World Bank income classification for 2019.
 

Millions of deaths

As reported by Mr. Larsen and Mr. Sánchez-Triana, children younger than 5 years lost an estimated 765 million IQ points worldwide because of lead exposure in this period. In 2019, 5,545,000 adults died from cardiovascular diseases caused by lead exposure. The scientists recorded 729 million of the IQ points lost (95.3%) and 5,004,000 (90.2%) of the deaths as occurring in LMICs.

The IQ loss here was nearly 80% higher than a previous estimate, wrote Mr. Larsen and Mr. Sánchez-Triana. The number of cardiovascular disease deaths they determined was six times higher than the GBD 2019 estimate.

“These are results with which the expert societies, especially the German Society of Pediatrics and Adolescent Medicine and the German Cardiac Society, and the corresponding professional associations need to concern themselves,” said Dr. Böse-O’Reilly.

Although blood lead concentrations have declined substantially since the phase-out of leaded gasoline, especially in Western countries, lead still represents a major health issue because it stays in the bones for decades.

European situation moderate

“We need a broad discussion on questions such as whether lead levels should be included in prophylactic assessments in certain age groups, what blood level is even tolerable, and in what situation medicinal therapy with chelating agents would possibly be appropriate,” said Dr. Böse-O’Reilly.

“Of course, we cannot answer these questions on the basis of one individual study,” he added. “However, the work in question definitely illustrates how dangerous lead can be and that we need further research into the actual burden and the best preventive measures.”

In this respect, the situation in Europe is still comparatively moderate. “Globally, lead exposure has risen in recent years,” said Dr. Böse-O’Reilly. According to an investigation by the Planet Earth Foundation, outside of the European Union, lead can increasingly be found in toys, spices, and cooking utensils, for example.

“Especially in lower-income countries, there is a lack of consumer protection or a good monitoring program like we have here in the EU,” said Dr. Böse-O’Reilly. In these countries, lead is sometimes added to spices by unscrupulous retailers to make the color more intense or to simply add to its weight to gain more profit.

Recycling lead-acid batteries or other electrical waste, often transferred to poorer countries, constitutes a large problem. “In general, children in Germany have a blood lead level of less than 1 mcg/dL,” explained Dr. Böse-O’Reilly. “In some regions of Indonesia, where these recycling factories are located, more than 50% of children have levels of more than 20 mcg/dL.”
 

Particulate matter

According to Mr. Larsen and Mr. Sánchez-Triana, the global cost of increased lead exposure was around $6 trillion USD in 2019, which was equivalent to 6.9% of global GDP. About 77% of the cost ($4.62 trillion USD) comprised the welfare costs of cardiovascular disease mortality, and 23% ($1.38 trillion USD) comprised the present value of future income losses because of IQ loss in children.

“Our findings suggest that global lead exposure has health and economic costs on par with PM2.5 air pollution,” wrote the authors. This places lead as an environmental risk factor on par with particulate matter and above that of air pollution from solid fuels, ahead of unsafe drinking water, unhygienic sanitation, or insufficient handwashing.

“This finding is in contrast to that of GBD 2019, which ranked lead exposure as a distant fourth environmental risk factor, due to not accounting for IQ loss in children – other than idiopathic developmental intellectual disability in a small subset of children – and reporting a substantially lower estimate of adult cardiovascular disease mortality,” wrote Mr. Larsen and Mr. Sánchez-Triana.

“A central implication for future research and policy is that LMICs bear an extraordinarily large share of the health and cost burden of lead exposure,” wrote the authors. Consequently, improved quality of blood lead level measurements and identification of sources containing lead are urgently needed there.
 

Improved recycling methods

Dr. Böse-O’Reilly would like an increased focus on children. “If children’s cognitive skills are lost, this of course has a long-term effect on a country’s economic position,” he said. “Precisely that which LMICs actually need for their development is being stripped from them.

“We should think long and hard about whether we really need to send so much of our electrical waste and so many old cars to poorer countries, where they are incorrectly recycled,” he warned. “We should at least give the LMICs the support necessary for them to be able to process lead-containing products in the future so that less lead makes it into the environment.

“Through these global cycles, we all contribute a lot toward the worldwide lead burden,” Dr. Böse-O’Reilly said. “In my opinion, the German Supply Chain Act is therefore definitely sensible. Not only does it protect our own economy, but it also protects the health of people in other countries.”

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

In a large prospective study, a graded higher risk of all-cause mortality and mortality from cardiovascular disease (CVD) and ischemic heart disease (IHD) emerged in adults with moderate to severe depressive symptoms, compared with those with no such symptoms.

Participants with mild depressive symptoms had a 35%-49% higher risk of all-cause and CVD mortality, respectively, while for those with moderate to severe depressive symptoms, the risk of all-cause, CVD, and IHD mortality was 62%, 79%, and 121% higher, respectively.

Dr. Zefeng Zhang, CDC

“This information highlights the importance for clinicians to identify patients with depressive symptoms and help them engage in treatment,” lead author Zefeng Zhang, MD, PhD, of the division for heart disease and stroke prevention at the U.S. Centers for Disease Control and Prevention, Atlanta, said in an interview.

The study appears in JAMA Network Open.

A nonclassic risk factor for CVD death

This graded positive association between depressive symptoms and CVD death was observed in data from the National Health and Nutrition Examination Survey 2005-2018, which were linked with the National Death Index through 2019 for adults aged 20 and older. Data analysis occurred from March 1 to May 26, 2023. According to the authors, their analyses extend findings from previous research by assessing these associations in a large, diverse, and nationally representative sample. Using more nuanced CVD-related causes of death, depressive symptoms emerged as a nontraditional risk factor for CVD mortality.

The study

In a total cohort of 23,694, about half male, mean overall age 44.7 years, prevalences of mild and moderate to severe depression were 14.9% and 7.2%, respectively, with depressive symptoms assessed by the nine-item Patient Health Questionnaire asking about symptoms over the past 2 weeks.

Adults with depression had significantly lower CV health scores in six of the American Heart Association Life’s Essential 8 metrics for heart health. For all-cause mortality, hazard ratios were 1.35 (95% confidence interval, 1.07-1.72) for mild depressive symptoms vs. none and 1.62 (95% CI, 1.24-2.12) for moderate to severe depressive symptoms vs. none.

The corresponding hazard ratios were 1.49 (95% CI, 1.11-2.0) and 1.79 (95% CI,1.22-2.62) for CVD mortality and 0.96 (95% CI, 0.58-1.60) and 2.21 (95% CI, 1.24-3.91) for IHD death, with associations largely consistent across subgroups.

At the highest severity of depressive symptoms (almost daily for past 2 weeks), feeling tired or having little energy, poor appetite or overeating, and having little interest in doing things were significantly associated with all-cause and CVD mortality after adjusting for potential confounders.

Approximately 11%-16% of the positive associations could be explained by lifestyle factors such as excess alcohol consumption, overeating, and inactivity as per the AHA’s Life’s Essential 8 metrics.

“Taken together with the body of literature on associations between depression and CVD mortality, these findings can support public health efforts to develop a comprehensive, nationwide strategy to improve well-being, including both mental and cardiovascular health,” Dr. Zhang and associates wrote.

This research was funded by the U.S. Centers for Disease Control and Prevention. The authors had no conflicts of interest to disclose.

In a large prospective study, a graded higher risk of all-cause mortality and mortality from cardiovascular disease (CVD) and ischemic heart disease (IHD) emerged in adults with moderate to severe depressive symptoms, compared with those with no such symptoms.

Participants with mild depressive symptoms had a 35%-49% higher risk of all-cause and CVD mortality, respectively, while for those with moderate to severe depressive symptoms, the risk of all-cause, CVD, and IHD mortality was 62%, 79%, and 121% higher, respectively.

Dr. Zefeng Zhang, CDC

“This information highlights the importance for clinicians to identify patients with depressive symptoms and help them engage in treatment,” lead author Zefeng Zhang, MD, PhD, of the division for heart disease and stroke prevention at the U.S. Centers for Disease Control and Prevention, Atlanta, said in an interview.

The study appears in JAMA Network Open.

A nonclassic risk factor for CVD death

This graded positive association between depressive symptoms and CVD death was observed in data from the National Health and Nutrition Examination Survey 2005-2018, which were linked with the National Death Index through 2019 for adults aged 20 and older. Data analysis occurred from March 1 to May 26, 2023. According to the authors, their analyses extend findings from previous research by assessing these associations in a large, diverse, and nationally representative sample. Using more nuanced CVD-related causes of death, depressive symptoms emerged as a nontraditional risk factor for CVD mortality.

The study

In a total cohort of 23,694, about half male, mean overall age 44.7 years, prevalences of mild and moderate to severe depression were 14.9% and 7.2%, respectively, with depressive symptoms assessed by the nine-item Patient Health Questionnaire asking about symptoms over the past 2 weeks.

Adults with depression had significantly lower CV health scores in six of the American Heart Association Life’s Essential 8 metrics for heart health. For all-cause mortality, hazard ratios were 1.35 (95% confidence interval, 1.07-1.72) for mild depressive symptoms vs. none and 1.62 (95% CI, 1.24-2.12) for moderate to severe depressive symptoms vs. none.

The corresponding hazard ratios were 1.49 (95% CI, 1.11-2.0) and 1.79 (95% CI,1.22-2.62) for CVD mortality and 0.96 (95% CI, 0.58-1.60) and 2.21 (95% CI, 1.24-3.91) for IHD death, with associations largely consistent across subgroups.

At the highest severity of depressive symptoms (almost daily for past 2 weeks), feeling tired or having little energy, poor appetite or overeating, and having little interest in doing things were significantly associated with all-cause and CVD mortality after adjusting for potential confounders.

Approximately 11%-16% of the positive associations could be explained by lifestyle factors such as excess alcohol consumption, overeating, and inactivity as per the AHA’s Life’s Essential 8 metrics.

“Taken together with the body of literature on associations between depression and CVD mortality, these findings can support public health efforts to develop a comprehensive, nationwide strategy to improve well-being, including both mental and cardiovascular health,” Dr. Zhang and associates wrote.

This research was funded by the U.S. Centers for Disease Control and Prevention. The authors had no conflicts of interest to disclose.

In a large prospective study, a graded higher risk of all-cause mortality and mortality from cardiovascular disease (CVD) and ischemic heart disease (IHD) emerged in adults with moderate to severe depressive symptoms, compared with those with no such symptoms.

Participants with mild depressive symptoms had a 35%-49% higher risk of all-cause and CVD mortality, respectively, while for those with moderate to severe depressive symptoms, the risk of all-cause, CVD, and IHD mortality was 62%, 79%, and 121% higher, respectively.

Dr. Zefeng Zhang, CDC

“This information highlights the importance for clinicians to identify patients with depressive symptoms and help them engage in treatment,” lead author Zefeng Zhang, MD, PhD, of the division for heart disease and stroke prevention at the U.S. Centers for Disease Control and Prevention, Atlanta, said in an interview.

The study appears in JAMA Network Open.

A nonclassic risk factor for CVD death

This graded positive association between depressive symptoms and CVD death was observed in data from the National Health and Nutrition Examination Survey 2005-2018, which were linked with the National Death Index through 2019 for adults aged 20 and older. Data analysis occurred from March 1 to May 26, 2023. According to the authors, their analyses extend findings from previous research by assessing these associations in a large, diverse, and nationally representative sample. Using more nuanced CVD-related causes of death, depressive symptoms emerged as a nontraditional risk factor for CVD mortality.

The study

In a total cohort of 23,694, about half male, mean overall age 44.7 years, prevalences of mild and moderate to severe depression were 14.9% and 7.2%, respectively, with depressive symptoms assessed by the nine-item Patient Health Questionnaire asking about symptoms over the past 2 weeks.

Adults with depression had significantly lower CV health scores in six of the American Heart Association Life’s Essential 8 metrics for heart health. For all-cause mortality, hazard ratios were 1.35 (95% confidence interval, 1.07-1.72) for mild depressive symptoms vs. none and 1.62 (95% CI, 1.24-2.12) for moderate to severe depressive symptoms vs. none.

The corresponding hazard ratios were 1.49 (95% CI, 1.11-2.0) and 1.79 (95% CI,1.22-2.62) for CVD mortality and 0.96 (95% CI, 0.58-1.60) and 2.21 (95% CI, 1.24-3.91) for IHD death, with associations largely consistent across subgroups.

At the highest severity of depressive symptoms (almost daily for past 2 weeks), feeling tired or having little energy, poor appetite or overeating, and having little interest in doing things were significantly associated with all-cause and CVD mortality after adjusting for potential confounders.

Approximately 11%-16% of the positive associations could be explained by lifestyle factors such as excess alcohol consumption, overeating, and inactivity as per the AHA’s Life’s Essential 8 metrics.

“Taken together with the body of literature on associations between depression and CVD mortality, these findings can support public health efforts to develop a comprehensive, nationwide strategy to improve well-being, including both mental and cardiovascular health,” Dr. Zhang and associates wrote.

This research was funded by the U.S. Centers for Disease Control and Prevention. The authors had no conflicts of interest to disclose.

TOPLINE:

Almost one-quarter of pregnant women who have had a heart transplant (HT) will experience severe maternal morbidity (SMM) during their hospital stay for delivery, and they have sevenfold greater risk for preterm birth than do other pregnant women, results of a large study with a nationwide sample suggest.

METHODOLOGY:

• The retrospective cohort study included 2010-2020 information from the Nationwide Readmissions Database (NRD), a large, all-payer administrative dataset that allows for tracking of patient hospital readmissions in the same U.S. state within the same calendar year and includes patient demographics, hospital characteristics, diagnosis and procedure codes (including for cardiac transplants), length of stay, and discharge disposition.
• The primary outcome was nontransfusion SMM which, among other conditions, included acute myocardial infarction, aortic aneurysm, acute renal failure, adult respiratory distress syndrome, amniotic fluid embolism, cardiac arrest/ventricular fibrillation, and heart failure/arrest, during the delivery hospitalization.
• Additional outcomes included rates of all SMMs (including transfusion), a composite cardiovascular SMM (cSMM) outcome that included acute myocardial infarction, aortic aneurysm, cardiac arrest/ventricular fibrillation, cardioversion, and acute heart failure, preterm birth, and readmission rates.

TAKEAWAY:

• From 2010 to 2020, there were 19,399,521 hospital deliveries, of which, 105 were in HT recipients.
• In unadjusted comparisons, rates of all outcomes were higher in HT, compared with non-HT delivery hospitalizations, and after adjusting for age, demographic and facility characteristics, comorbid conditions, and calendar year, HT recipients continued to have higher odds of adverse maternal outcomes. For example, HT recipients had higher rates of nontransfusion SMM (adjusted odds ratio, 28.12; 95% confidence interval, 15.65-50.53), all SMM (aOR, 15.73; 95% CI, 9.17-27.00), cSMM (aOR, 37.7; 95% CI, 17.39-82.01), and preterm birth (aOR, 7.15; 95%, CI 4.75-10.77).
• HT recipients also had longer hospital stays and higher rates of cesarean delivery, although the authors noted that it’s unclear whether this increase was caused by the HT or complications of pregnancy because data were unavailable regarding indication for cesareans.
• Patients with HT were also at increased risk for hospital readmission within the first year after delivery, particularly within the first 6 months, including for HT-related complications, a finding that supports guidelines recommending an initial postpartum visit within 7-14 days of discharge for patients with cardiac conditions, write the authors.

IN PRACTICE:

The findings demonstrate the importance of counseling HT patients at early gestational ages “to provide information about anticipated risks in pregnancy and the postpartum period to allow patients the opportunity to make informed choices regarding their reproductive options,” the authors conclude.

SOURCE:

The study was conducted by Amanda M. Craig, MD, division of maternal fetal medicine, department of obstetrics and gynecology, Duke University Medical Center, Durham, N.C., and colleagues. It was published online in JACC Heart Failure.

LIMITATIONS:

Relying on diagnosis and procedure codes in administrative datasets like NRD may result in underestimation of outcomes. In this study, outcomes were limited to delivery hospitalizations, which may underestimate the true incidence of complications or fail to include pregnancies that didn’t end in a delivery, including pregnancy terminations or spontaneous abortions. Information related to race, ethnicity, hospital regions, and cause of death are not captured in the NRD dataset.

DISCLOSURES:

The authors have no relevant conflicts of interest.

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

TOPLINE:

Almost one-quarter of pregnant women who have had a heart transplant (HT) will experience severe maternal morbidity (SMM) during their hospital stay for delivery, and they have sevenfold greater risk for preterm birth than do other pregnant women, results of a large study with a nationwide sample suggest.

METHODOLOGY:

• The retrospective cohort study included 2010-2020 information from the Nationwide Readmissions Database (NRD), a large, all-payer administrative dataset that allows for tracking of patient hospital readmissions in the same U.S. state within the same calendar year and includes patient demographics, hospital characteristics, diagnosis and procedure codes (including for cardiac transplants), length of stay, and discharge disposition.
• The primary outcome was nontransfusion SMM which, among other conditions, included acute myocardial infarction, aortic aneurysm, acute renal failure, adult respiratory distress syndrome, amniotic fluid embolism, cardiac arrest/ventricular fibrillation, and heart failure/arrest, during the delivery hospitalization.
• Additional outcomes included rates of all SMMs (including transfusion), a composite cardiovascular SMM (cSMM) outcome that included acute myocardial infarction, aortic aneurysm, cardiac arrest/ventricular fibrillation, cardioversion, and acute heart failure, preterm birth, and readmission rates.

TAKEAWAY:

• From 2010 to 2020, there were 19,399,521 hospital deliveries, of which, 105 were in HT recipients.
• In unadjusted comparisons, rates of all outcomes were higher in HT, compared with non-HT delivery hospitalizations, and after adjusting for age, demographic and facility characteristics, comorbid conditions, and calendar year, HT recipients continued to have higher odds of adverse maternal outcomes. For example, HT recipients had higher rates of nontransfusion SMM (adjusted odds ratio, 28.12; 95% confidence interval, 15.65-50.53), all SMM (aOR, 15.73; 95% CI, 9.17-27.00), cSMM (aOR, 37.7; 95% CI, 17.39-82.01), and preterm birth (aOR, 7.15; 95%, CI 4.75-10.77).
• HT recipients also had longer hospital stays and higher rates of cesarean delivery, although the authors noted that it’s unclear whether this increase was caused by the HT or complications of pregnancy because data were unavailable regarding indication for cesareans.
• Patients with HT were also at increased risk for hospital readmission within the first year after delivery, particularly within the first 6 months, including for HT-related complications, a finding that supports guidelines recommending an initial postpartum visit within 7-14 days of discharge for patients with cardiac conditions, write the authors.

IN PRACTICE:

The findings demonstrate the importance of counseling HT patients at early gestational ages “to provide information about anticipated risks in pregnancy and the postpartum period to allow patients the opportunity to make informed choices regarding their reproductive options,” the authors conclude.

SOURCE:

The study was conducted by Amanda M. Craig, MD, division of maternal fetal medicine, department of obstetrics and gynecology, Duke University Medical Center, Durham, N.C., and colleagues. It was published online in JACC Heart Failure.

LIMITATIONS:

Relying on diagnosis and procedure codes in administrative datasets like NRD may result in underestimation of outcomes. In this study, outcomes were limited to delivery hospitalizations, which may underestimate the true incidence of complications or fail to include pregnancies that didn’t end in a delivery, including pregnancy terminations or spontaneous abortions. Information related to race, ethnicity, hospital regions, and cause of death are not captured in the NRD dataset.

DISCLOSURES:

The authors have no relevant conflicts of interest.

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

TOPLINE:

Almost one-quarter of pregnant women who have had a heart transplant (HT) will experience severe maternal morbidity (SMM) during their hospital stay for delivery, and they have sevenfold greater risk for preterm birth than do other pregnant women, results of a large study with a nationwide sample suggest.

METHODOLOGY:

• The retrospective cohort study included 2010-2020 information from the Nationwide Readmissions Database (NRD), a large, all-payer administrative dataset that allows for tracking of patient hospital readmissions in the same U.S. state within the same calendar year and includes patient demographics, hospital characteristics, diagnosis and procedure codes (including for cardiac transplants), length of stay, and discharge disposition.
• The primary outcome was nontransfusion SMM which, among other conditions, included acute myocardial infarction, aortic aneurysm, acute renal failure, adult respiratory distress syndrome, amniotic fluid embolism, cardiac arrest/ventricular fibrillation, and heart failure/arrest, during the delivery hospitalization.
• Additional outcomes included rates of all SMMs (including transfusion), a composite cardiovascular SMM (cSMM) outcome that included acute myocardial infarction, aortic aneurysm, cardiac arrest/ventricular fibrillation, cardioversion, and acute heart failure, preterm birth, and readmission rates.

TAKEAWAY:

• From 2010 to 2020, there were 19,399,521 hospital deliveries, of which, 105 were in HT recipients.
• In unadjusted comparisons, rates of all outcomes were higher in HT, compared with non-HT delivery hospitalizations, and after adjusting for age, demographic and facility characteristics, comorbid conditions, and calendar year, HT recipients continued to have higher odds of adverse maternal outcomes. For example, HT recipients had higher rates of nontransfusion SMM (adjusted odds ratio, 28.12; 95% confidence interval, 15.65-50.53), all SMM (aOR, 15.73; 95% CI, 9.17-27.00), cSMM (aOR, 37.7; 95% CI, 17.39-82.01), and preterm birth (aOR, 7.15; 95%, CI 4.75-10.77).
• HT recipients also had longer hospital stays and higher rates of cesarean delivery, although the authors noted that it’s unclear whether this increase was caused by the HT or complications of pregnancy because data were unavailable regarding indication for cesareans.
• Patients with HT were also at increased risk for hospital readmission within the first year after delivery, particularly within the first 6 months, including for HT-related complications, a finding that supports guidelines recommending an initial postpartum visit within 7-14 days of discharge for patients with cardiac conditions, write the authors.

IN PRACTICE:

The findings demonstrate the importance of counseling HT patients at early gestational ages “to provide information about anticipated risks in pregnancy and the postpartum period to allow patients the opportunity to make informed choices regarding their reproductive options,” the authors conclude.

SOURCE:

The study was conducted by Amanda M. Craig, MD, division of maternal fetal medicine, department of obstetrics and gynecology, Duke University Medical Center, Durham, N.C., and colleagues. It was published online in JACC Heart Failure.

LIMITATIONS:

Relying on diagnosis and procedure codes in administrative datasets like NRD may result in underestimation of outcomes. In this study, outcomes were limited to delivery hospitalizations, which may underestimate the true incidence of complications or fail to include pregnancies that didn’t end in a delivery, including pregnancy terminations or spontaneous abortions. Information related to race, ethnicity, hospital regions, and cause of death are not captured in the NRD dataset.

DISCLOSURES:

The authors have no relevant conflicts of interest.

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

TOPLINE:

There is an extensive genetic overlap between schizophrenia and smoking, but there are also schizophrenia genes that may protect against obesity, illustrating the bidirectional effects of shared loci across cardiovascular disease (CVD) risk factors, results of new research suggest.

METHODOLOGY:

• Genome-wide association studies (GWAS) have detected several loci associated with CVD risk factors, including body mass index (BMI), waist-to-hip ratio, type 2 diabetes, lipids, and blood pressure, with increasing evidence suggesting genetic overlap between such risk factors and schizophrenia.
• Researchers obtained what they call an “unprecedentedly large” set of GWAS samples, including schizophrenia (53,386 patients and 77,258 controls) and various CVD risk factors.
• They used analytic approaches to identify genetic links between schizophrenia and CVD risk factors, including bivariate causal mixture model (MiXeR), which estimates the number of shared genetic variants between pairs of phenotypes, and conditional and conjunctional false discovery rate (condFDR and conjFDR), to identify specific genetic loci; these approaches can identify genetic overlap regardless of the effect directions.

TAKEAWAY:

• Using MiXeR, the study showed that several genetic variants underlying schizophrenia also influence CVD phenotypes, particularly risk factors of smoking and BMI.
• A total of 825 distinct loci were jointly associated with schizophrenia and CVD phenotypes at conjFDR < .05.
• Most of the loci shared with smoking were in line with positive genetic correlations; the authors noted individuals with schizophrenia are more nicotine dependent than the general population, and they experience greater reinforcing effects of nicotine and worse withdrawal symptoms during abstinence than the general population.
• The overlapping loci with BMI had effect directions consistent with negative genetic correlations, suggesting people with schizophrenia are genetically predisposed to lower BMI; this is in line with evidence of low BMI being a risk factor for schizophrenia, although obesity is more common in people with schizophrenia.
• There was a pattern of mixed effect directions among loci jointly associated with schizophrenia and lipids, blood pressure, type 2 diabetes, waist-to-hip ratio, and coronary artery disease, which may reflect variation in genetic susceptibility to CVD across subgroups of schizophrenia.

IN PRACTICE:

The new results “shed light” on biological pathways associated with comorbidity between CVD and schizophrenia, said the authors, adding future work could provide insights into mechanisms underlying the comorbidity and could facilitate development of antipsychotics with lower metabolic side effects, which could help prevent comorbid CVD, “thereby helping to mitigate a major clinical and health care problem.”

SOURCE:

The study was led by Linn Rødevand, PhD, Norwegian Center for Mental Disorders Research, Division of Mental Health and Addiction, Institute of Clinical Medicine, Oslo University Hospital, University of Oslo, and colleagues. It was published online in the American Journal of Psychiatry.

LIMITATIONS:

Methods used in the study are limited by uncertainties in translating genetic loci to causal variants, which restricts the biological interpretation of the shared genetic variants. Among other methodological limitations are that discrepancies between the linkage disequilibrium structure of the samples used for the GWAS and that of the reference panel may have biased estimates underlying MiXeR.

DISCLOSURES:

The study received support from the Research Council of Norway, Norwegian Health Association, South-East Norway Regional Health Authority, and the European Union. Dr. Rødevand reports no relevant financial relationships.

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

TOPLINE:

There is an extensive genetic overlap between schizophrenia and smoking, but there are also schizophrenia genes that may protect against obesity, illustrating the bidirectional effects of shared loci across cardiovascular disease (CVD) risk factors, results of new research suggest.

METHODOLOGY:

• Genome-wide association studies (GWAS) have detected several loci associated with CVD risk factors, including body mass index (BMI), waist-to-hip ratio, type 2 diabetes, lipids, and blood pressure, with increasing evidence suggesting genetic overlap between such risk factors and schizophrenia.
• Researchers obtained what they call an “unprecedentedly large” set of GWAS samples, including schizophrenia (53,386 patients and 77,258 controls) and various CVD risk factors.
• They used analytic approaches to identify genetic links between schizophrenia and CVD risk factors, including bivariate causal mixture model (MiXeR), which estimates the number of shared genetic variants between pairs of phenotypes, and conditional and conjunctional false discovery rate (condFDR and conjFDR), to identify specific genetic loci; these approaches can identify genetic overlap regardless of the effect directions.

TAKEAWAY:

• Using MiXeR, the study showed that several genetic variants underlying schizophrenia also influence CVD phenotypes, particularly risk factors of smoking and BMI.
• A total of 825 distinct loci were jointly associated with schizophrenia and CVD phenotypes at conjFDR < .05.
• Most of the loci shared with smoking were in line with positive genetic correlations; the authors noted individuals with schizophrenia are more nicotine dependent than the general population, and they experience greater reinforcing effects of nicotine and worse withdrawal symptoms during abstinence than the general population.
• The overlapping loci with BMI had effect directions consistent with negative genetic correlations, suggesting people with schizophrenia are genetically predisposed to lower BMI; this is in line with evidence of low BMI being a risk factor for schizophrenia, although obesity is more common in people with schizophrenia.
• There was a pattern of mixed effect directions among loci jointly associated with schizophrenia and lipids, blood pressure, type 2 diabetes, waist-to-hip ratio, and coronary artery disease, which may reflect variation in genetic susceptibility to CVD across subgroups of schizophrenia.

IN PRACTICE:

The new results “shed light” on biological pathways associated with comorbidity between CVD and schizophrenia, said the authors, adding future work could provide insights into mechanisms underlying the comorbidity and could facilitate development of antipsychotics with lower metabolic side effects, which could help prevent comorbid CVD, “thereby helping to mitigate a major clinical and health care problem.”

SOURCE:

The study was led by Linn Rødevand, PhD, Norwegian Center for Mental Disorders Research, Division of Mental Health and Addiction, Institute of Clinical Medicine, Oslo University Hospital, University of Oslo, and colleagues. It was published online in the American Journal of Psychiatry.

LIMITATIONS:

Methods used in the study are limited by uncertainties in translating genetic loci to causal variants, which restricts the biological interpretation of the shared genetic variants. Among other methodological limitations are that discrepancies between the linkage disequilibrium structure of the samples used for the GWAS and that of the reference panel may have biased estimates underlying MiXeR.

DISCLOSURES:

The study received support from the Research Council of Norway, Norwegian Health Association, South-East Norway Regional Health Authority, and the European Union. Dr. Rødevand reports no relevant financial relationships.

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

TOPLINE:

There is an extensive genetic overlap between schizophrenia and smoking, but there are also schizophrenia genes that may protect against obesity, illustrating the bidirectional effects of shared loci across cardiovascular disease (CVD) risk factors, results of new research suggest.

METHODOLOGY:

• Genome-wide association studies (GWAS) have detected several loci associated with CVD risk factors, including body mass index (BMI), waist-to-hip ratio, type 2 diabetes, lipids, and blood pressure, with increasing evidence suggesting genetic overlap between such risk factors and schizophrenia.
• Researchers obtained what they call an “unprecedentedly large” set of GWAS samples, including schizophrenia (53,386 patients and 77,258 controls) and various CVD risk factors.
• They used analytic approaches to identify genetic links between schizophrenia and CVD risk factors, including bivariate causal mixture model (MiXeR), which estimates the number of shared genetic variants between pairs of phenotypes, and conditional and conjunctional false discovery rate (condFDR and conjFDR), to identify specific genetic loci; these approaches can identify genetic overlap regardless of the effect directions.

TAKEAWAY:

• Using MiXeR, the study showed that several genetic variants underlying schizophrenia also influence CVD phenotypes, particularly risk factors of smoking and BMI.
• A total of 825 distinct loci were jointly associated with schizophrenia and CVD phenotypes at conjFDR < .05.
• Most of the loci shared with smoking were in line with positive genetic correlations; the authors noted individuals with schizophrenia are more nicotine dependent than the general population, and they experience greater reinforcing effects of nicotine and worse withdrawal symptoms during abstinence than the general population.
• The overlapping loci with BMI had effect directions consistent with negative genetic correlations, suggesting people with schizophrenia are genetically predisposed to lower BMI; this is in line with evidence of low BMI being a risk factor for schizophrenia, although obesity is more common in people with schizophrenia.
• There was a pattern of mixed effect directions among loci jointly associated with schizophrenia and lipids, blood pressure, type 2 diabetes, waist-to-hip ratio, and coronary artery disease, which may reflect variation in genetic susceptibility to CVD across subgroups of schizophrenia.

IN PRACTICE:

The new results “shed light” on biological pathways associated with comorbidity between CVD and schizophrenia, said the authors, adding future work could provide insights into mechanisms underlying the comorbidity and could facilitate development of antipsychotics with lower metabolic side effects, which could help prevent comorbid CVD, “thereby helping to mitigate a major clinical and health care problem.”

SOURCE:

The study was led by Linn Rødevand, PhD, Norwegian Center for Mental Disorders Research, Division of Mental Health and Addiction, Institute of Clinical Medicine, Oslo University Hospital, University of Oslo, and colleagues. It was published online in the American Journal of Psychiatry.

LIMITATIONS:

Methods used in the study are limited by uncertainties in translating genetic loci to causal variants, which restricts the biological interpretation of the shared genetic variants. Among other methodological limitations are that discrepancies between the linkage disequilibrium structure of the samples used for the GWAS and that of the reference panel may have biased estimates underlying MiXeR.

DISCLOSURES:

The study received support from the Research Council of Norway, Norwegian Health Association, South-East Norway Regional Health Authority, and the European Union. Dr. Rødevand reports no relevant financial relationships.

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

Use of continuous positive-airway pressure devices for at least 4 hours a day was associated with a reduced risk of major adverse cardiac and cerebrovascular events in adults with cardiovascular disease and obstructive sleep apnea, based on data from more than 4,000 individuals.

Obstructive sleep apnea (OSA) is associated with an increased risk of cardiovascular diseases, but the association between management of OSA with a continuous positive-airway pressure device (CPAP) and major adverse cardiac or cerebrovascular events (MACCEs) remains unclear, wrote Manuel Sánchez-de-la-Torre, PhD, of the University of Lleida, Spain, and colleagues.

In a meta-analysis published in JAMA, the researchers reviewed data from 4,186 individuals with a mean age of 61.2 years; 82.1% were men. The study population included 2,097 patients who used CPAP and 2,089 who did not. The mean apnea-hypopnea index (AHI) was 31.2 events per hour, and OSA was defined as an oxygen desaturation index of 12 events or more per hour or an AHI of 15 events or more per hour. The composite primary outcome included the first MACCE, or death from cardiovascular causes, myocardial infarction, stroke, revascularization procedure, hospital admission for heart failure, hospital admission for unstable angina, or hospital admission for transient ischemic attack. Each of these components was a secondary endpoint.

Overall, the primary outcome of MACCE was similar for CPAP and non-CPAP using patients (hazard ratio, 1.01) with a total of 349 MACCE events in the CPAP group and 342 in the non-CPAP group. The mean adherence to CPAP was 3.1 hours per day. A total of 38.5% of patients in the CPAP group met the criteria for good adherence, defined as a mean of 4 or more hours per day.

However, as defined, good adherence to CPAP significantly reduced the risk of MACCE, compared with no CPAP use (HR, 0.69), and a sensitivity analysis showed a significant risk reduction, compared with patients who did not meet the criteria for good adherence (HR, 0.55; P = .005).

“Adherence to treatment is complex to determine and there are other potential factors that could affect patient adherence, such as health education, motivation, attitude, self-efficacy, psychosocial factors, and other health care system–related features,” the researchers wrote in their discussion.

The findings were limited by several factors including the evaluation only of CPAP as a treatment for OSA, and the inability to assess separate components of the composite endpoint, the researchers noted. Other limitations included the relatively small number of female patients, reliance mainly on at-home sleep apnea tests, and the potential for selection bias, they said.

However, the results suggest that CPAP adherence is important to prevention of secondary cardiovascular outcomes in OSA patients, and that implementation of specific and personalized strategies to improve adherence to treatment should be a clinical priority, they concluded.

The study was funded by the Instituto de Salud Carlos III, the European Union and FEDER, IRBLleida–Fundació Dr Pifarré, SEPAR, ResMed Ltd. (Australia), Associació Lleidatana de Respiratori, and CIBERES. Dr Sánchez-de-la-Torre also disclosed financial support from a Ramón y Cajal grant.

Use of continuous positive-airway pressure devices for at least 4 hours a day was associated with a reduced risk of major adverse cardiac and cerebrovascular events in adults with cardiovascular disease and obstructive sleep apnea, based on data from more than 4,000 individuals.

Obstructive sleep apnea (OSA) is associated with an increased risk of cardiovascular diseases, but the association between management of OSA with a continuous positive-airway pressure device (CPAP) and major adverse cardiac or cerebrovascular events (MACCEs) remains unclear, wrote Manuel Sánchez-de-la-Torre, PhD, of the University of Lleida, Spain, and colleagues.

In a meta-analysis published in JAMA, the researchers reviewed data from 4,186 individuals with a mean age of 61.2 years; 82.1% were men. The study population included 2,097 patients who used CPAP and 2,089 who did not. The mean apnea-hypopnea index (AHI) was 31.2 events per hour, and OSA was defined as an oxygen desaturation index of 12 events or more per hour or an AHI of 15 events or more per hour. The composite primary outcome included the first MACCE, or death from cardiovascular causes, myocardial infarction, stroke, revascularization procedure, hospital admission for heart failure, hospital admission for unstable angina, or hospital admission for transient ischemic attack. Each of these components was a secondary endpoint.

Overall, the primary outcome of MACCE was similar for CPAP and non-CPAP using patients (hazard ratio, 1.01) with a total of 349 MACCE events in the CPAP group and 342 in the non-CPAP group. The mean adherence to CPAP was 3.1 hours per day. A total of 38.5% of patients in the CPAP group met the criteria for good adherence, defined as a mean of 4 or more hours per day.

However, as defined, good adherence to CPAP significantly reduced the risk of MACCE, compared with no CPAP use (HR, 0.69), and a sensitivity analysis showed a significant risk reduction, compared with patients who did not meet the criteria for good adherence (HR, 0.55; P = .005).

“Adherence to treatment is complex to determine and there are other potential factors that could affect patient adherence, such as health education, motivation, attitude, self-efficacy, psychosocial factors, and other health care system–related features,” the researchers wrote in their discussion.

The findings were limited by several factors including the evaluation only of CPAP as a treatment for OSA, and the inability to assess separate components of the composite endpoint, the researchers noted. Other limitations included the relatively small number of female patients, reliance mainly on at-home sleep apnea tests, and the potential for selection bias, they said.

However, the results suggest that CPAP adherence is important to prevention of secondary cardiovascular outcomes in OSA patients, and that implementation of specific and personalized strategies to improve adherence to treatment should be a clinical priority, they concluded.

The study was funded by the Instituto de Salud Carlos III, the European Union and FEDER, IRBLleida–Fundació Dr Pifarré, SEPAR, ResMed Ltd. (Australia), Associació Lleidatana de Respiratori, and CIBERES. Dr Sánchez-de-la-Torre also disclosed financial support from a Ramón y Cajal grant.

Use of continuous positive-airway pressure devices for at least 4 hours a day was associated with a reduced risk of major adverse cardiac and cerebrovascular events in adults with cardiovascular disease and obstructive sleep apnea, based on data from more than 4,000 individuals.

Obstructive sleep apnea (OSA) is associated with an increased risk of cardiovascular diseases, but the association between management of OSA with a continuous positive-airway pressure device (CPAP) and major adverse cardiac or cerebrovascular events (MACCEs) remains unclear, wrote Manuel Sánchez-de-la-Torre, PhD, of the University of Lleida, Spain, and colleagues.

In a meta-analysis published in JAMA, the researchers reviewed data from 4,186 individuals with a mean age of 61.2 years; 82.1% were men. The study population included 2,097 patients who used CPAP and 2,089 who did not. The mean apnea-hypopnea index (AHI) was 31.2 events per hour, and OSA was defined as an oxygen desaturation index of 12 events or more per hour or an AHI of 15 events or more per hour. The composite primary outcome included the first MACCE, or death from cardiovascular causes, myocardial infarction, stroke, revascularization procedure, hospital admission for heart failure, hospital admission for unstable angina, or hospital admission for transient ischemic attack. Each of these components was a secondary endpoint.

Overall, the primary outcome of MACCE was similar for CPAP and non-CPAP using patients (hazard ratio, 1.01) with a total of 349 MACCE events in the CPAP group and 342 in the non-CPAP group. The mean adherence to CPAP was 3.1 hours per day. A total of 38.5% of patients in the CPAP group met the criteria for good adherence, defined as a mean of 4 or more hours per day.

However, as defined, good adherence to CPAP significantly reduced the risk of MACCE, compared with no CPAP use (HR, 0.69), and a sensitivity analysis showed a significant risk reduction, compared with patients who did not meet the criteria for good adherence (HR, 0.55; P = .005).

“Adherence to treatment is complex to determine and there are other potential factors that could affect patient adherence, such as health education, motivation, attitude, self-efficacy, psychosocial factors, and other health care system–related features,” the researchers wrote in their discussion.

The findings were limited by several factors including the evaluation only of CPAP as a treatment for OSA, and the inability to assess separate components of the composite endpoint, the researchers noted. Other limitations included the relatively small number of female patients, reliance mainly on at-home sleep apnea tests, and the potential for selection bias, they said.

However, the results suggest that CPAP adherence is important to prevention of secondary cardiovascular outcomes in OSA patients, and that implementation of specific and personalized strategies to improve adherence to treatment should be a clinical priority, they concluded.

The study was funded by the Instituto de Salud Carlos III, the European Union and FEDER, IRBLleida–Fundació Dr Pifarré, SEPAR, ResMed Ltd. (Australia), Associació Lleidatana de Respiratori, and CIBERES. Dr Sánchez-de-la-Torre also disclosed financial support from a Ramón y Cajal grant.

One in three patients who experience their first bout of atrial fibrillation (AFib) during hospitalization can expect to experience a recurrence of the arrhythmia within the year, new research shows.

The findings, reported in Annals of Internal Medicine, suggest these patients may be good candidates for oral anticoagulants to reduce their risk for stroke.

“Atrial fibrillation is very common in patients for the very first time in their life when they’re sick and in the hospital,” said William F. McIntyre, MD, PhD, a cardiologist at McMaster University, Hamilton, Ont., who led the study. These new insights into AFib management suggest there is a need for primary care physicians to be on the lookout for potential recurrence.

AFib is strongly linked to stroke, and patients at greater risk for stroke may be prescribed oral anticoagulants. Although the arrhythmia can be reversed before the patient is discharged from the hospital, risk for recurrence was unclear, Dr. McIntyre said.

“We wanted to know if the patient was in atrial fibrillation because of the physiologic stress that they were under, or if they just have the disease called atrial fibrillation, which should usually be followed lifelong by a specialist,” Dr. McIntyre said.

Dr. McIntyre and colleagues followed 139 patients (mean age, 71 years) at three medical centers in Ontario who experienced new-onset AFib during their hospital stay, along with an equal number of patients who had no history of AFib and who served as controls. The research team used a Holter monitor to record study participants’ heart rhythm for 14 days to detect incident AFib at 1 and 6 months after discharge. They also followed up with periodic phone calls for up to 12 months. Among the study participants, half were admitted for noncardiac surgeries, and the other half were admitted for medical illnesses, including infections and pneumonia. Participants with a prior history of AFib were excluded from the analysis.

The primary outcome of the study was an episode of AFib that lasted at least 30 seconds on the monitor or one detected during routine care at the 12-month mark.

Patients who experienced AFib for the first time in the hospital had roughly a 33% risk for recurrence within a year, nearly sevenfold higher than their age- and sex-matched counterparts who had not had an arrhythmia during their hospital stay (3%; confidence interval, 0%-6.4%).

“This study has important implications for management of patients who have a first presentation of AFib that is concurrent with a reversible physiologic stressor,” the authors wrote. “An AFib recurrence risk of 33.1% at 1 year is neither low enough to conclude that transient new-onset AFib in the setting of another illness is benign nor high enough that all such transient new-onset AFib can be assumed to be paroxysmal AFib. Instead, these results call for risk stratification and follow-up in these patients.”

The researchers reported that among people with recurrent AFib in the study, the median total time in arrhythmia was 9 hours. “This far exceeds the cutoff of 6 minutes that was established as being associated with stroke using simulated AFib screening in patients with implanted continuous monitors,” they wrote. “These results suggest that the patients in our study who had AFib detected in follow-up are similar to contemporary patients with AFib for whom evidence-based therapies, including oral anticoagulation, are warranted.”

Dr. McIntyre and colleagues were able to track outcomes and treatments for the patients in the study. In the group with recurrent AFib, 1 had a stroke, 2 experienced systemic embolism, 3 had a heart failure event, 6 experienced bleeding, and 11 died. In the other group, there was one case of stroke, one of heart failure, four cases involving bleeding, and seven deaths. “The proportion of participants with new-onset AFib during their initial hospitalization who were taking oral anticoagulants was 47.1% at 6 months and 49.2% at 12 months. This included 73% of participants with AFib detected during follow-up and 39% who did not have AFib detected during follow-up,” they wrote.

The uncertain nature of AFib recurrence complicates predictions about patients’ posthospitalization experiences within the following year. “We cannot just say: ‘Hey, this is just a reversible illness, and now we can forget about it,’ ” Dr. McIntyre said. “Nor is the risk of recurrence so strong in the other direction that you can give patients a lifelong diagnosis of atrial fibrillation.”
 

Role for primary care

Without that certainty, physicians cannot refer everyone who experiences new-onset AFib to a cardiologist for long-term care. The variability in recurrence rates necessitates a more nuanced and personalized approach. Here, primary care physicians step in, offering tailored care based on their established, long-term patient relationships, Dr. McIntyre said.

The study participants already have chronic health conditions that bring them into regular contact with their family physician. This gives primary care physicians a golden opportunity to be on lookout and to recommend care from a cardiologist at the appropriate time if it becomes necessary, he said.

“I have certainly seen cases of recurrent atrial fibrillation in patients who had an episode while hospitalized, and consistent with this study, this is a common clinical occurrence,” said Deepak L. Bhatt, MD, MPH, director of Mount Sinai Heart, New York. Primary care physicians must remain vigilant and avoid the temptation to attribute AFib solely to illness or surgery

“Ideally, we would have randomized clinical trial data to guide the decision about whether to use prophylactic anticoagulation,” said Dr. Bhatt, who added that a cardiology consultation may also be appropriate.

Dr. McIntyre reported no relevant financial relationships. Dr. Bhatt reported numerous relationships with industry.

A version of this article appeared on Medscape.com.

One in three patients who experience their first bout of atrial fibrillation (AFib) during hospitalization can expect to experience a recurrence of the arrhythmia within the year, new research shows.

The findings, reported in Annals of Internal Medicine, suggest these patients may be good candidates for oral anticoagulants to reduce their risk for stroke.

“Atrial fibrillation is very common in patients for the very first time in their life when they’re sick and in the hospital,” said William F. McIntyre, MD, PhD, a cardiologist at McMaster University, Hamilton, Ont., who led the study. These new insights into AFib management suggest there is a need for primary care physicians to be on the lookout for potential recurrence.

AFib is strongly linked to stroke, and patients at greater risk for stroke may be prescribed oral anticoagulants. Although the arrhythmia can be reversed before the patient is discharged from the hospital, risk for recurrence was unclear, Dr. McIntyre said.

“We wanted to know if the patient was in atrial fibrillation because of the physiologic stress that they were under, or if they just have the disease called atrial fibrillation, which should usually be followed lifelong by a specialist,” Dr. McIntyre said.

Dr. McIntyre and colleagues followed 139 patients (mean age, 71 years) at three medical centers in Ontario who experienced new-onset AFib during their hospital stay, along with an equal number of patients who had no history of AFib and who served as controls. The research team used a Holter monitor to record study participants’ heart rhythm for 14 days to detect incident AFib at 1 and 6 months after discharge. They also followed up with periodic phone calls for up to 12 months. Among the study participants, half were admitted for noncardiac surgeries, and the other half were admitted for medical illnesses, including infections and pneumonia. Participants with a prior history of AFib were excluded from the analysis.

The primary outcome of the study was an episode of AFib that lasted at least 30 seconds on the monitor or one detected during routine care at the 12-month mark.

Patients who experienced AFib for the first time in the hospital had roughly a 33% risk for recurrence within a year, nearly sevenfold higher than their age- and sex-matched counterparts who had not had an arrhythmia during their hospital stay (3%; confidence interval, 0%-6.4%).

“This study has important implications for management of patients who have a first presentation of AFib that is concurrent with a reversible physiologic stressor,” the authors wrote. “An AFib recurrence risk of 33.1% at 1 year is neither low enough to conclude that transient new-onset AFib in the setting of another illness is benign nor high enough that all such transient new-onset AFib can be assumed to be paroxysmal AFib. Instead, these results call for risk stratification and follow-up in these patients.”

The researchers reported that among people with recurrent AFib in the study, the median total time in arrhythmia was 9 hours. “This far exceeds the cutoff of 6 minutes that was established as being associated with stroke using simulated AFib screening in patients with implanted continuous monitors,” they wrote. “These results suggest that the patients in our study who had AFib detected in follow-up are similar to contemporary patients with AFib for whom evidence-based therapies, including oral anticoagulation, are warranted.”

Dr. McIntyre and colleagues were able to track outcomes and treatments for the patients in the study. In the group with recurrent AFib, 1 had a stroke, 2 experienced systemic embolism, 3 had a heart failure event, 6 experienced bleeding, and 11 died. In the other group, there was one case of stroke, one of heart failure, four cases involving bleeding, and seven deaths. “The proportion of participants with new-onset AFib during their initial hospitalization who were taking oral anticoagulants was 47.1% at 6 months and 49.2% at 12 months. This included 73% of participants with AFib detected during follow-up and 39% who did not have AFib detected during follow-up,” they wrote.

The uncertain nature of AFib recurrence complicates predictions about patients’ posthospitalization experiences within the following year. “We cannot just say: ‘Hey, this is just a reversible illness, and now we can forget about it,’ ” Dr. McIntyre said. “Nor is the risk of recurrence so strong in the other direction that you can give patients a lifelong diagnosis of atrial fibrillation.”
 

Role for primary care

Without that certainty, physicians cannot refer everyone who experiences new-onset AFib to a cardiologist for long-term care. The variability in recurrence rates necessitates a more nuanced and personalized approach. Here, primary care physicians step in, offering tailored care based on their established, long-term patient relationships, Dr. McIntyre said.

The study participants already have chronic health conditions that bring them into regular contact with their family physician. This gives primary care physicians a golden opportunity to be on lookout and to recommend care from a cardiologist at the appropriate time if it becomes necessary, he said.

“I have certainly seen cases of recurrent atrial fibrillation in patients who had an episode while hospitalized, and consistent with this study, this is a common clinical occurrence,” said Deepak L. Bhatt, MD, MPH, director of Mount Sinai Heart, New York. Primary care physicians must remain vigilant and avoid the temptation to attribute AFib solely to illness or surgery

“Ideally, we would have randomized clinical trial data to guide the decision about whether to use prophylactic anticoagulation,” said Dr. Bhatt, who added that a cardiology consultation may also be appropriate.

Dr. McIntyre reported no relevant financial relationships. Dr. Bhatt reported numerous relationships with industry.

A version of this article appeared on Medscape.com.

One in three patients who experience their first bout of atrial fibrillation (AFib) during hospitalization can expect to experience a recurrence of the arrhythmia within the year, new research shows.

The findings, reported in Annals of Internal Medicine, suggest these patients may be good candidates for oral anticoagulants to reduce their risk for stroke.

“Atrial fibrillation is very common in patients for the very first time in their life when they’re sick and in the hospital,” said William F. McIntyre, MD, PhD, a cardiologist at McMaster University, Hamilton, Ont., who led the study. These new insights into AFib management suggest there is a need for primary care physicians to be on the lookout for potential recurrence.

AFib is strongly linked to stroke, and patients at greater risk for stroke may be prescribed oral anticoagulants. Although the arrhythmia can be reversed before the patient is discharged from the hospital, risk for recurrence was unclear, Dr. McIntyre said.

“We wanted to know if the patient was in atrial fibrillation because of the physiologic stress that they were under, or if they just have the disease called atrial fibrillation, which should usually be followed lifelong by a specialist,” Dr. McIntyre said.

Dr. McIntyre and colleagues followed 139 patients (mean age, 71 years) at three medical centers in Ontario who experienced new-onset AFib during their hospital stay, along with an equal number of patients who had no history of AFib and who served as controls. The research team used a Holter monitor to record study participants’ heart rhythm for 14 days to detect incident AFib at 1 and 6 months after discharge. They also followed up with periodic phone calls for up to 12 months. Among the study participants, half were admitted for noncardiac surgeries, and the other half were admitted for medical illnesses, including infections and pneumonia. Participants with a prior history of AFib were excluded from the analysis.

The primary outcome of the study was an episode of AFib that lasted at least 30 seconds on the monitor or one detected during routine care at the 12-month mark.

Patients who experienced AFib for the first time in the hospital had roughly a 33% risk for recurrence within a year, nearly sevenfold higher than their age- and sex-matched counterparts who had not had an arrhythmia during their hospital stay (3%; confidence interval, 0%-6.4%).

“This study has important implications for management of patients who have a first presentation of AFib that is concurrent with a reversible physiologic stressor,” the authors wrote. “An AFib recurrence risk of 33.1% at 1 year is neither low enough to conclude that transient new-onset AFib in the setting of another illness is benign nor high enough that all such transient new-onset AFib can be assumed to be paroxysmal AFib. Instead, these results call for risk stratification and follow-up in these patients.”

The researchers reported that among people with recurrent AFib in the study, the median total time in arrhythmia was 9 hours. “This far exceeds the cutoff of 6 minutes that was established as being associated with stroke using simulated AFib screening in patients with implanted continuous monitors,” they wrote. “These results suggest that the patients in our study who had AFib detected in follow-up are similar to contemporary patients with AFib for whom evidence-based therapies, including oral anticoagulation, are warranted.”

Dr. McIntyre and colleagues were able to track outcomes and treatments for the patients in the study. In the group with recurrent AFib, 1 had a stroke, 2 experienced systemic embolism, 3 had a heart failure event, 6 experienced bleeding, and 11 died. In the other group, there was one case of stroke, one of heart failure, four cases involving bleeding, and seven deaths. “The proportion of participants with new-onset AFib during their initial hospitalization who were taking oral anticoagulants was 47.1% at 6 months and 49.2% at 12 months. This included 73% of participants with AFib detected during follow-up and 39% who did not have AFib detected during follow-up,” they wrote.

The uncertain nature of AFib recurrence complicates predictions about patients’ posthospitalization experiences within the following year. “We cannot just say: ‘Hey, this is just a reversible illness, and now we can forget about it,’ ” Dr. McIntyre said. “Nor is the risk of recurrence so strong in the other direction that you can give patients a lifelong diagnosis of atrial fibrillation.”
 

Role for primary care

Without that certainty, physicians cannot refer everyone who experiences new-onset AFib to a cardiologist for long-term care. The variability in recurrence rates necessitates a more nuanced and personalized approach. Here, primary care physicians step in, offering tailored care based on their established, long-term patient relationships, Dr. McIntyre said.

The study participants already have chronic health conditions that bring them into regular contact with their family physician. This gives primary care physicians a golden opportunity to be on lookout and to recommend care from a cardiologist at the appropriate time if it becomes necessary, he said.

“I have certainly seen cases of recurrent atrial fibrillation in patients who had an episode while hospitalized, and consistent with this study, this is a common clinical occurrence,” said Deepak L. Bhatt, MD, MPH, director of Mount Sinai Heart, New York. Primary care physicians must remain vigilant and avoid the temptation to attribute AFib solely to illness or surgery

“Ideally, we would have randomized clinical trial data to guide the decision about whether to use prophylactic anticoagulation,” said Dr. Bhatt, who added that a cardiology consultation may also be appropriate.

Dr. McIntyre reported no relevant financial relationships. Dr. Bhatt reported numerous relationships with industry.

A version of this article appeared on Medscape.com.

Federal Health Care Data Trends (click to view the digital edition) is a special supplement to Federal Practitioner, highlighting the latest research and study outcomes related to the health of veteran and active-duty populations.

In this issue: 

• Limb Loss and Prostheses
• Neurology
  • Traumatic Brain Injury
  • Alzheimer's and Dementia
  • Amyotrophic Lateral Sclerosis (ALS)
  • Parkinson's Disease
  • Migraine and Headache
• Cardiology
• Mental Health
  • Depression
  • Opioid Use Disorder
  • PTSD and Psychedelic Treatments
  • Homelessness
  • Eating Disorders
• Diabetes
• Rheumatoid Arthritis
• Respiratory illnesses
• Women's Health
  • Access to Care
  • Infertility
  • Pregnancy
• HPV and Related Cancers

Federal Health Care Data Trends (click to view the digital edition) is a special supplement to Federal Practitioner, highlighting the latest research and study outcomes related to the health of veteran and active-duty populations.

In this issue: 

• Limb Loss and Prostheses
• Neurology
  • Traumatic Brain Injury
  • Alzheimer's and Dementia
  • Amyotrophic Lateral Sclerosis (ALS)
  • Parkinson's Disease
  • Migraine and Headache
• Cardiology
• Mental Health
  • Depression
  • Opioid Use Disorder
  • PTSD and Psychedelic Treatments
  • Homelessness
  • Eating Disorders
• Diabetes
• Rheumatoid Arthritis
• Respiratory illnesses
• Women's Health
  • Access to Care
  • Infertility
  • Pregnancy
• HPV and Related Cancers

Federal Health Care Data Trends (click to view the digital edition) is a special supplement to Federal Practitioner, highlighting the latest research and study outcomes related to the health of veteran and active-duty populations.

In this issue: 

• Limb Loss and Prostheses
• Neurology
  • Traumatic Brain Injury
  • Alzheimer's and Dementia
  • Amyotrophic Lateral Sclerosis (ALS)
  • Parkinson's Disease
  • Migraine and Headache
• Cardiology
• Mental Health
  • Depression
  • Opioid Use Disorder
  • PTSD and Psychedelic Treatments
  • Homelessness
  • Eating Disorders
• Diabetes
• Rheumatoid Arthritis
• Respiratory illnesses
• Women's Health
  • Access to Care
  • Infertility
  • Pregnancy
• HPV and Related Cancers