Bypass Grafting of Aberrant Circumflex Artery with Anomalous Origin and Course

We present a case of a rarely seen anomalous circumflex (Cx) artery originating from the proximal right coronary artery. This was an incidental finding during a diagnostic coronary angiogram performed to investigate a patient with acute coronary syndrome. Surgically significant disease was present in four left-sided vessels. The patient underwent coronary artery bypass grafts using left internal thoracic artery and long saphenous vein grafts to all four left sided vessels including the aberrant Cx. We also present a discussion of current relevant literature and guidelines in relation to definition, classification, incidence, diagnosis, clinical relevance and treatment of this type of coronary artery anomalies.