Myocardial Infarction Myocardial Infarction What is Myocardial Infarction? Myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow to a part of the heart muscle is blocked for a prolonged period. This lack of blood flow causes damage or death to the heart muscle. The primary cause of myocardial infarction is the buildup of fatty deposits, or atherosclerosis, in the coronary arteries. Symptoms of Myocardial Infarction The symptoms of a myocardial infarction can vary from person to person. Common symptoms include: Chest pain or discomfort Pain in the neck, jaw, or back Pain or discomfort in the arms or shoulders Shortness of breath Nausea or vomiting Cold sweat Feeling lightheaded or dizzy It's important to note that not all people experience che...