title: Variation in origin of the posterior descending coronary artery.
mesh_terms: D001014:Aortic Aneurysm / Q000000981:diagnostic imaging*; D003330:Coronary Vessel Anomalies / Q000000981:diagnostic imaging*; D006801:Humans; D011859:Radiography; D012850:Sinus of Valsalva / Q000000981:diagnostic imaging*