Final answer:
The primary goal of IV nitroglycerin (Tridil) is to relax the smooth muscle in the coronary vessels and promote vasodilation, increasing blood flow and relieving chest pain. It is also used to treat high blood pressure and certain heart rhythm abnormalities.
Step-by-step explanation:
The primary goal of IV nitroglycerin (Tridil) is to relax the smooth muscle in the tunica media of coronary vessels and promote vasodilation. This helps to increase blood flow and oxygen supply to the heart muscle, relieving chest pain (angina) caused by reduced blood supply. Nitroglycerin is also used to treat high blood pressure and certain heart rhythm abnormalities.