Anatomy of the Aortic Valvar Complex
The coronary arteries arise from the aortic sinuses. The initial portion of the aortic root, which houses the leaflets of the aortic valve, is occupied by the aortic sinuses, also called the sinuses of Valsalva. The aortic sinuses reach beyond the upper border of the cusp and form a well-defined, complete, and circumferential sinotubular ridge when viewed from the aortic aspect. These sinuses are named according to their position as the anterior, left posterior, and right posterior aortic sinuses. The right coronary artery arises from the anterior coronary sinus and the left coronary artery from the left posterior aortic sinus.