Coronary heart disease in African Americans
L T Clark1, K C Ferdinand, J M Flack
1Division of Cardiovascular Medicine, State University of New York Health Science Center, Brooklyn, New York, USA.
Insights
African Americans face higher coronary heart disease (CHD) mortality, especially younger individuals. Addressing risk factors like hypertension and diabetes is crucial for reducing deaths.
Area of Science:
- Cardiovascular Medicine
- Public Health
- Health Disparities
Background:
- African Americans exhibit the highest coronary heart disease (CHD) mortality rates in the U.S.
- Excess mortality is particularly pronounced in out-of-hospital settings and at younger ages.
- Contributing factors include prevalent risk factors, delayed treatment, and limited cardiovascular care access.
Purpose of the Study:
- To examine ethnic differences in coronary heart disease (CHD) clinical manifestations and risk factors.
- To identify key areas for risk reduction strategies in African Americans.
Main Methods:
- The abstract does not specify methods but discusses clinical observations and risk factor prevalence.
- Analysis of clinical presentation, angiography findings, and risk factor burden in African Americans compared to whites.
Main Results:
- Clinical presentation of CHD is similar, but African Americans have higher risks of sudden cardiac death, unstable angina, and non-Q-wave myocardial infarction.
- While angiography may show less obstructive disease, the total burden of coronary atherosclerosis can be similar or greater.
- Hypertension and type 2 diabetes are disproportionately prevalent and severe in African Americans, influencing clinical manifestations.
Conclusions:
- Ethnic disparities in CHD outcomes are influenced by the heterogeneity of coronary syndromes and the high prevalence of hypertension and type 2 diabetes.
- Aggressive risk factor modification, including hypertension control, diabetes management, dyslipidemia treatment, and smoking cessation, is essential for risk reduction.
Abstract:
African Americans have the highest overall mortality rate from coronary heart disease (CHD) of any ethnic group in the United States, particularly out-of-hospital deaths, and especially at younger ages. Although all of the reasons for the excess CHD mortality among African Americans have not been elucidated, it is clear that there is a high prevalence of certain coronary risk factors, delay in the recognition and treatment of high-risk individuals, and limited access to cardiovascular care. The clinical spectrum of acute and chronic CHD in African Americans is similar to that in whites. However, African Americans have a higher risk of sudden cardiac death and present more often with unstable angina and non-Q-wave myocardial infarction than whites. African Americans have less obstructive coronary artery disease on angiography, but may have a similar or greater total burden of coronary atherosclerosis. Ethnic differences in the clinical manifestations of CHD may be explained largely by the inherent heterogeneity of the coronary syndromes, and the disproportionately high prevalence and severity of hypertension and type 2 diabetes in African Americans. Identification of high-risk individuals for vigorous risk factor modification-especially control of hypertension, regression of left ventricular hypertrophy, control of diabetes, treatment of dyslipidemia, and smoking cessation--is key for successful risk reduction.
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