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Coronary heart disease in black Africans: an overview
1Medical School, Marseille, France.
Insights
Coronary heart disease is rare in Black Africans but presents aggressively, often as a first manifestation with unique arterial findings. Outcomes are severe due to delayed care and socio-economic factors.
Area of Science:
- Cardiology
- Epidemiology
- African Health
Background:
- Coronary heart disease (CHD) is uncommon in Black Africans, comprising 6% of cardiovascular diseases.
- However, its incidence is rising, presenting unique clinical characteristics.
- Understanding these differences is crucial for targeted interventions.
Purpose of the Study:
- To characterize myocardial infarction (MI) in Black Africans.
- To compare MI presentation and outcomes with Western populations.
- To identify unique risk factors and challenges in this demographic.
Main Methods:
- Retrospective analysis of MI cases in Black Africans.
- Comparison with epidemiological data from Western countries.
- Assessment of coronary arteriography, risk factors, and long-term outcomes.
Main Results:
- MI in Black Africans often occurs before age 40, frequently as the initial disease manifestation.
- Low prevalence of coronary artery stenosis and frequent normal coronary arteriography findings were noted.
- Hemoglobin S or C trait may be a unique risk factor.
Conclusions:
- Myocardial infarction in Black Africans exhibits distinct features compared to Western populations.
- Severe long-term outcomes are linked to delayed hospitalization, lack of advanced treatments, and socio-economic barriers.
- Further research into unique risk factors like hemoglobinopathies is warranted.
Abstract:
Coronary heart disease is still rare representing only 6% of all cardiovascular diseases in black Africans despite its increased incidence in recent years. Myocardial infarction in black Africans shows similar characteristics as those seen in patients aged under 40 years in the west, particularly regarding the frequency of infarction as the first manifestation of the disease, low prevalence of coronary artery stenosis and relatively common finding of normal coronary arteriography. Risk factor profile is the same as in western countries, but the haemoglobin S or C trait could be a unique one. The long-term outcome of infarction is severe and influenced by myocardial sequelae of imprecise origin; delayed hospitalisation; absence of thrombolysis and angioplasty; and socio-economic and literacy problems.