Effect of coronary artery size on the prevalence of atherosclerosis

Area of Science:

• Cardiology
• Vascular Biology
• Medical Imaging

Background:

• Atherosclerosis is a leading cause of cardiovascular disease.
• The relationship between coronary artery size and atherosclerosis prevalence requires further investigation.

Purpose of the Study:

• To determine if coronary artery diameter influences the likelihood of developing significant atherosclerotic lesions.
• To identify small coronary artery size as a potential risk factor for atherosclerosis.

Main Methods:

• Prospective measurement of major coronary artery diameters in 884 patients undergoing coronary arteriography.
• Classification of patients into small (S), average (A), and large (L) artery size groups based on standard deviations from the mean.
• Comparison of lesion frequency (> or = 50% diameter stenosis) between small and large artery groups, with logistic regression adjustment for covariates.

Main Results:

• Significantly higher prevalence of > or = 50% lesions in small versus large arteries for the right coronary artery (61.3% vs 35.8%, p=0.0001), left anterior descending artery (58.1% vs 40.7%, p=0.008), and circumflex artery (47.4% vs 22.2%, p=0.0001).
• Coronary diameter was a significant independent predictor of lesions in the right coronary artery, left anterior descending artery, and circumflex artery.
• A trend towards significance was observed for the left main artery (p=0.077).

Conclusions:

• Small coronary artery size is associated with an increased prevalence of significant atherosclerotic lesions.
• Coronary artery diameter is an independent predictor of atherosclerosis in major coronary arteries.
• Findings suggest that small coronary artery size may represent a novel risk factor for atherosclerosis.