[Coronary heart disease: epidemiologic-genetic aspects]

Area of Science:

• Cardiovascular Epidemiology
• Medical Genetics
• Preventive Cardiology

Background:

• Coronary heart disease (CHD) risk factors aggregate within families.
• Understanding the extent to which familial resemblance explains disease clustering is crucial.

Purpose of the Study:

• To review existing literature on familial clustering of CHD risk factors.
• To identify gaps in knowledge regarding unidentified factors contributing to familial CHD aggregation.

Main Methods:

• Systematic review of 16 investigations employing diverse study designs.
• Included prospective studies, high/low-risk group analyses, case-control studies, coronary angiogram patient studies, and ethnic group comparisons.

Main Results:

• Familial clustering of CHD is not fully explained by known risk factors: serum lipids, blood pressure, smoking, and diabetes.
• Evidence suggests the existence of unidentified genetic, environmental, or combined factors contributing to familial aggregation.

Conclusions:

• Future research should prioritize family-based studies and interdisciplinary collaboration between epidemiologists and geneticists.
• Discovering novel genetic influences could enhance the precision of identifying individuals predisposed to CHD.
• Enhanced prediction tests will improve the efficiency of high-risk strategies for CHD prevention.