Right coronary angiogram in left anterior oblique view
Full length of the right coronary artery is seen in a C shape in the left anterior oblique (LAO) view. Proximally it gives off the right ventricular branches and distally it divides into posterior left ventricular branch and posterior descending coronary artery. The division occurs at the crux, the crossing point of the inter ventricular and atrioventricular grooves posteriorly. The artery which crosses the crux is defined as the dominant coronary artery. Right coronary dominance is much more common than left dominance. Even when the right coronary artery is dominant, the major portion of left ventricular myocardium is supplied by the left coronary artery.