Where do the coronary arteries originate?

Aortic cusps. They originate in the left and right cusps (folds) of the aortic valve.
The cusps aortic val. The coronary arteries arise from the cusps of the aortic valve . The right coronary artery comes from the rt cusp and the left main from the the left cusp.The left main cor art then gives off the lad and lcx arteries. There are cases when the take off are diffrent and this is called an abberant take off and is congenital.