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Coronary artery disease and risk factors in Black South Africans--a comparative study
M R Nethononda1, M R Essop, A D Mbewu
1Department of Cardiology, Chris Hani Baragwanath Hospital, Soweto, South Africa.
Insights
African patients with significant coronary artery disease (CAD) had lower cholesterol levels than non-Africans. Their cholesterol is within recommended ranges, impacting risk assessment and treatment in developing nations.
Area of Science:
- Cardiology
- Public Health
- Ethnic Health Disparities
Background:
- Coronary artery disease (CAD) is a significant health concern globally.
- Understanding ethnic variations in CAD risk factors is crucial for targeted prevention and treatment strategies.
Purpose of the Study:
- To identify and compare coronary risk factors in different South African ethnic groups.
- To assess these factors in patients with angiographically confirmed significant CAD.
Main Methods:
- Retrospective analysis of hospital records from 500 patients undergoing coronary angiography.
- Data included demographics, risk factors, CAD severity, and left ventricular ejection fraction (LVEF).
Main Results:
- Of 206 patients with significant CAD, 85 were African and 121 non-African.
- Africans had higher rates of hypertension and more females.
- Africans exhibited significantly lower total cholesterol and LDL cholesterol levels.
Conclusions:
- Cholesterol levels in African patients with significant CAD align with NCEP ATP III guidelines.
- Findings suggest a need to re-evaluate cholesterol-based risk assessment and cholesterol-lowering treatment in developing countries.
Objective:
The purpose of this study was to identify and compare coronary risk factors in different South African ethnic groups with angiographically documented significant coronary artery disease (CAD).
Design:
An observational retrospective analysis.
Methods:
Hospital records of 500 consecutive patients with no previous coronary interventions who underwent coronary angiography at Chris Hani Baragwanath Hospital, Soweto over a 2-year period were reviewed. Patients with significant CAD were selected for this study. Data analyzed included demographics, presenting diagnoses, coronary risk factors, number of coronary arteries significantly affected and extent of CAD, left ventricular ejection fraction (LVEF), and the main treatment modality for CAD.
Results:
Of the 206 patients with significant CAD, 85 were Africans and 121 were non-Africans. There were significantly more females in the African group (31% vs 12%, P=.0023) and hypertension was more prevalent in the same group (78% vs 55%, P=.0006). Serum total (TC) and low-density lipoprotein (LDL) cholesterol were significantly lower in African than in non-African patients [189.5 (96.67-313.2) vs 228.2 (127.6-464) mg/dL; P=.0006 and 100.5 (34.8-282.3) vs 146.9 (42.54-313.2) mg/dL; P=.0001, respectively].
Conclusion:
Cholesterol levels in this group of African patients with angiographically significant CAD are within the target range recommended by the adult treatment panel III (ATP III) guidelines of the National Cholesterol Education Program (NCEP). These data have implications for risk assessment using cholesterol and the role of cholesterol lowering treatment in populations of developing countries.
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