Anomalous origin of the left main coronary artery from the right aortic sinus of Valsalva with vasospastic angina.

A case of anomalous origin of the left main trunk of the coronary artery from the right aortic sinus of Valsalva with vasospastic angina is described. Vasospasm was induced in the left main coronary artery by intracoronary administration of ergonovine. To our knowledge, this is the first reported case of vasospastic angina occurring in the presence of the anomalous origin of the left main coronary artery from the right aortic sinus.