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In other people, this area is supplied by a branch of the left circumflex artery.
In 90% of people, the right coronary artery also supplies the area of the atrioventricular node just beneath the surface of the septum dividing the right atrium from the right ventricle.
The Left Coronary Artery arises from the aortic root as a single short main left coronary artery, the left mainstem.
The left mainstem bifurcates to form the: Surface Vessels and End Arteries The ramifications of the coronary arteries run along the surface and branch into the wall of the heart.
The RCA supplies the right ventricular wall, the posterior part of the interventricular septum, and most of the inferior wall of the left ventricle.