What are the main reasons nitroglycerin is given to a patient with ACS?

What are the main reasons nitroglycerin is given to a patient with ACS?

• A. To increase afterload to improve perfusion
• B. To reduce preload and dilate coronary arteries
• C. To decrease heart rate significantly
• D. To treat infection

Answer: (B)

In ACS, the main goal of nitroglycerin is to lower the heart’s oxygen demand and improve blood flow to the ischemic tissue. The primary way this happens is venodilation, which reduces preload (the volume entering the heart). With less volume, the ventricle works less hard, wall stress drops, and myocardial oxygen consumption decreases. Nitroglycerin can also dilate coronary arteries, helping improve perfusion to areas of ischemia. This combination relieves chest pain and helps balance the oxygen supply and demand in the heart. It’s not used to increase afterload or to markedly slow the heart rate, and it’s not a treatment for infection.

In ACS, the main goal of nitroglycerin is to lower the heart’s oxygen demand and improve blood flow to the ischemic tissue. The primary way this happens is venodilation, which reduces preload (the volume entering the heart). With less volume, the ventricle works less hard, wall stress drops, and myocardial oxygen consumption decreases. Nitroglycerin can also dilate coronary arteries, helping improve perfusion to areas of ischemia. This combination relieves chest pain and helps balance the oxygen supply and demand in the heart.

It’s not used to increase afterload or to markedly slow the heart rate, and it’s not a treatment for infection.