A myocardial infarction is primarily defined as what?

A myocardial infarction, commonly known as a heart attack, is characterized primarily by a lack of oxygen to the heart tissue, leading to tissue death. This occurs when there is a blockage in one or more of the coronary arteries, which supply blood to the heart muscle. When blood flow is obstructed, the heart muscle does not receive the necessary oxygen and nutrients, resulting in cell death in the affected area. Understanding this definition is critical in the context of coding, as accurate coding relies on a clear understanding of the conditions being described. In this case, the definition highlights the consequences of ischemia (lack of blood flow) specifically affecting the heart tissue.