“Recently a congenital anomaly found at autopsy was described to me. Since the heart was not removed I can only describe the findings. The infant which was cyanotic at birth, breathed with great difficulty and died within twenty-four hours with signs of cardiac failure. At autopsy the heart muscle was congested and the heart itself was moderately dilated…the only abnormal finding was in the pulmonary artery where above each sinus of valsalva there was a long narrow slit extending cleanly through the wall of the pulmonary artery…”