What is the relationship between angina and a heart attack?
Angina is different from a heart attack. Both relate to the blood flow through the coronary arteries (which bring blood to the heart muscle), but there is a key difference. With angina, the blood flow is reduced, especially when the heart must do more work. This imbalance between oxygen supply and demand is temporary leading to discomfort in the chest. With a heart attack, the blood flow to part of the heart muscle is suddenly cut off when a coronary artery is blocked.