Transposition of the aorta and pulmonary artery demonstrated by angiocardiography.

Complete transposition of the great vessels is one of the less common congenital anomalies. Survival after birth is dependent upon the presence of some communication between the right and left sides of the heart that will permit crossing of the greater and lesser circulations and enable venous blood to reach the lungs. The case described below is of particular interest because of the absence of diagnostic criteria afforded by the usual methods of clinical and radiological examination.