Selective injection of a left coronary artery arising anomalously from the posterior aortic sinus.

Six cases of anomalous origin of the left main coronary artery arising from the posterior or noncoronary aortic sinus have been previously found at autopsy by nonselective aortic sinus injection and only once by selective injection. The seventh known case of this anomaly is demonstrated by selective injection that also reveals distal severe coronary artery disease.