Anomalous Right Coronary Artery Arising From Distal Left Circumflex Artery

Abstract

Single coronary artery (SCA) is a rare congenital anomaly in which the cardiac myocardium is supplied by a coronary circulation arising from a single ostium off of the aorta. SCAs are commonly classified according to the Lipton classification system, and the incidence appears to range between 0.014% and 0.066%.1,2 Presentations of patients with SCA include detection as an incidental finding on angiography, atypical chest pain, typical chest pain thought to be secondary to spasm or decreased blood flow, and typical chest pain with atherosclerosis requiring percutaneous intervention or bypass grafting.