NREMT Advanced EMT Practice Test #3

Answer - A - Nitroglycerin is a smooth-muscle relaxant. The goal of the drug is to reduce cardiac workload. During times of stress or exercise, the heart often needs more oxygen than narrowed coronary arteries can supply. Relaxing the peripheral arteries reduces resistance and to some extent dilating the coronary arteries increases coronary blood flow and perfusion to the ischemic cells.