Anomalous origin of left coronary artery from pulmonary artery associated with an aorto-pulmonary septal defect

Aorto-pulmonary septal defects and anomalous origins of left coronary artery from pulmonary artery are briefly discussed. The difficulties of diagnosis and surgical correction are put forward in a situation when the left coronary artery arises from a site of high pressure and saturation, such as the pulmonary artery in the presence of an aorto-pulmonary septal defect, as in the case described.