Heart failure in blacks: etiologic and epidemiologic differences

Area of Science:

• Cardiology
• Cardiovascular Disease
• Health Disparities

Background:

• Heart failure (HF) in Black Americans is a significant clinical challenge.
• Hypertension is a primary cause of left ventricular (LV) dysfunction in over 60% of Black HF patients, compared to 30% with coronary artery disease.
• Black patients with HF experience worse outcomes, including advanced LV dysfunction, higher hospitalization rates, and at least 30% higher mortality than White Americans.

Purpose of the Study:

• To investigate the unique factors contributing to the distinct natural history of heart failure in Black Americans.
• To explore potential therapeutic targets based on observed differences in disease progression and outcomes.

Main Methods:

• This study is a review of existing data and clinical observations regarding heart failure in Black Americans.
• Analysis focuses on the prevalence of contributing factors like hypertension and coronary artery disease.
• Comparison of disease severity, hospitalization, and mortality rates between Black and White American heart failure patients.

Main Results:

• Black Americans with heart failure exhibit more advanced left ventricular dysfunction.
• Hospitalization and mortality rates are significantly higher in Black patients compared to White patients.
• Conventional treatments have shown inconsistent efficacy in this population.

Conclusions:

• Socioeconomic factors do not appear to fully explain the observed disparities in heart failure outcomes.
• Unique alterations in the neurohormonal environment are hypothesized to underlie the differences in heart failure progression and severity in Black Americans.
• Identifying these neurohormonal perturbations may lead to novel therapeutic strategies for heart failure in this demographic.