Anomalous channel between aorta and right ventricle; report of a case.

The occurrence of a congenital vascular tract between the left posterior aortic sinus of Valsalva and the right ventricle in a 13 month old boy is reported. A group of cardiovascular anomalies which clinically resemble a patent ductus arteriosus is discussed, and the help which cardiac catheterization may give in confirming the diagnosis is indicated.