Heart Failure in Elderly African-Americans.
Heart failure has emerged as one of the most important cardiovascular diseases in the elderly and has a major functional, economic, and social impact in older individuals. Racial differences in the morbidity and mortality, as well as in rates of hospitalization, have been reported in national surveys and epidemiologic studies. Because of the higher prevalence of hypertension and left ventricular hypertrophy in African-Americans compared to whites, these risk factors may be the principle determinants of the hemodynamic and clinical features of heart failure in African-Americans. The contribution of coronary disease with left ventricular remodeling secondary to myocardial ischemia or infarction varies among African-American populations, depending on the prevalence and impact of traditional risk factors for coronary heart disease. Atherosclerosis may play a greater role in the pathogenesis of heart failure in African-Americans as the impact of urbanization and the adoption of unhealthy lifestyles results in increased prevalence of risk factors for coronary artery disease. The hemodynamic and functional features of ventricular dysfunction in African-Americans with heart failure may range from asymptomatic diastolic dysfunction to typical systolic dysfunction. The differentiation of diastolic from systolic dysfunction, and hypertensive from ischemic cardiomyopathy, may be difficult in African-Americans and usually requires utilization of noninvasive cardiac diagnostic techniques. In addition to the type of ventricular dysfunction and the role of neurohormonal activation, consideration of age-related differences, ventricular structure and function, and variations in drug metabolism and pharmacokinetics are important.
Francis
Charles K.
CK
College of Physicians and Surgeons of Columbia University and Department of Medicine, Harlem Hospital Center, New York, NY.