MI is commonly called heart attack damage to cardiac muscle because of a lack blood supply true or false?

True.

Myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow decreases or stops to a part of the heart, causing damage to the heart muscle. The lack of blood supply is usually due to a blockage in one or more of the coronary arteries, which are the blood vessels that supply oxygen-rich blood to the heart muscle.