Which condition describes narrowing of the small blood vessels that supply blood and oxygen to the heart?

• A. Atherosclerosis
• B. Cardiomegaly
• C. CAD
• D. BBB

Answer: (C)

Narrowing of the arteries that supply blood and oxygen to the heart is described by coronary artery disease. This disease results from atherosclerosis, where plaques build up inside the coronary vessels, reducing their lumen and limiting blood flow to heart muscle. Atherosclerosis is the process behind the narrowing, but the clinically recognized condition affecting the heart’s vessels is CAD. Cardiomegaly means an enlarged heart, not narrowed vessels, and BBB refers to a conduction block in the heart, not vessel narrowing. So the description fits coronary artery disease, the disease of the coronary arteries caused by atherosclerosis.