There are three sinus in the wall of the aorta just superior to the aortic semilunar valve. The right coronary artery normally arises from the right sinus of Valsalva (RSV) of the ascending aorta. The left main coronary artery (LMCA) normally arises from the left sinus of Valsava. The third sinus, the right posterior aortic sinus does not normally give rise to a coronary artery.