Coronary artery disease (CAD, also called coronary heart disease, or CHD) is caused by the narrowing of the large blood vessels that supply the heart with oxygen. These are called coronary arteries. Arteries that have become extremely narrow can cause shortness of breath and chest pain during physical activity. If a coronary artery suddenly becomes completely blocked, it can result in a .
CAD can also lead to other health problems like heart failure or heart rhythm problems. Various treatments can be used to reduce the symptoms and the risk of complications.