The most common type of heart disease is
A. bacterial endocarditis.
B. coronary heart disease.
C. arterial fibrillation.
D. stenosis.
Question 2
Coronary heart disease is a disease that
A. affects the heart valves.
B. involves the chambers of the heart.
C. affects the blood vessels that serve the heart muscle.
D. is caused by heartbeat irregularities.