Blood supply to the heart

The heart muscle is supplied with oxygen and other nutrients by the coronary arteries, which arise from the aorta. The left side of the heart receives blood via the left main stem, which normally gives rise to the left anterior descending artery and the circumflex artery. The right side of the heart receives blood via the right coronary artery.  A limitation of arterial blood supply can cause angina or myocardial infarction, most commonly due to coronary artery disease.