Arteriosclerosis is best described as what?

• A. Arteries become thickened and hardened, reducing elasticity and narrowing vessels.
• B. Sudden blockage of a coronary artery due to a clot.
• C. Inflammation of the heart muscle.
• D. Enlargement of the heart chambers.

Answer: (A)

Arteriosclerosis describes arteries that have become thickened and hardened, which reduces their elasticity and narrows the vessel lumen. This loss of flexibility means the arteries can’t expand well to accommodate each heartbeat, leading to higher pulse pressure and potential reduced blood flow to organs over time. That exact description—thickened and hardened arteries with decreased elasticity and narrowed vessels—captures what arteriosclerosis is, making it the best choice. The other options point to different heart problems: a sudden blockage from a clot is an acute occlusion, inflammation of the heart muscle is myocarditis, and enlargement of the heart chambers is cardiomegaly.