An inferior infarction is a type of acute myocardial infarction, or heart attack, that occurs in the right coronary artery, as stated by Medscape. A heart attack occurs when an artery becomes blocked, preventing the flow of blood to the heart. As a result, the heart does not receive oxygen and the muscle begins to die.
According to the National Heart, Blood, and Lung Institute, heart attacks are the leading cause of death in the United States, with almost 1 million people experiencing heart attacks each year. The primary cause of heart attacks is coronary heart disease, which is a condition where plaque builds up inside the arteries over many years. The plaque can break open and form a clot that blocks the artery, causing a heart attack.