The coronary arteries are the vessels that supply the heart itself. The coronary arteries include the anterior descending branch, the gyral branch and the right coronary artery. The anterior descending and gyral branches originate from the left main trunk, and some may have no left main trunk, opening into the aorta, respectively, and there are three vessels in the coronary arteries. The main coronary artery-related diseases are coronary heart disease and coronary artery myocardial bridges. Coronary artery disease is caused by the accumulation of atherosclerotic plaques in the coronary arteries, resulting in a relative narrowing of the lumen and a relative lack of oxygen and blood supply to the myocardium when the cardiac exercise load increases. Coronary artery myocardial bridge is a congenital developmental anomaly due to the burial of the coronary artery in part of the myocardium.