Which of the following is true of an angioplasty?
A. It is a recording of the electrical activity of the heart.
B. It is a stress test during which workload is increased gradually until an individual reaches maximal fatigue.
C. It is the deposition of fat in the walls of arteries, leading to the formation of plaque.
D. It is a procedure in which a balloon-tipped catheter is inserted and inflated to widen the inner lumen of an artery.
E. It is the death of an area of heart muscle caused by reduced blood flow due to coronary artery obstruction.
Answer: D
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