Normal Coronary Arteries

The heart itself requires blood to work properly just like any other organ in the body. The heart muscle is fed with blood by the coronary arteries. The coronary arteries originate from the aorta just above the takeoff from the heart itself. Normally there are 2 coronary arteries, the right and the left. The right coronary artery supplies blood to the right atrium, right ventricle, the bottom portion of the left ventricle, and the back part of the ventricular septum. The left coronary artery divides into 2 major branches: the left anterior descending and the circumflex. The left anterior descending supplies blood to the front and bottom of the left ventricle, as well as the front portion of the ventricular septum. The circumflex supplies blood to the left atrium and the back portion of the left ventricle. Venous blood draining from the heart muscle returns by way of the coronary veins to the coronary sinus which eventually drains into the right atrium.