Fallot's tetralogy with absent pulmonary valve and anomalous origin of the left pulmonary artery.

A 1-day-old asymptomatic neonate with a to and fro precordial murmur was diagnosed by cross sectional echocardiography to have Fallot's tetralogy with absent pulmonary valve, and origin of the left pulmonary artery from the ascending aorta. Moderate stenoses at the origin of the anomalous left pulmonary artery and of the right pulmonary artery were present, allowing definitive surgical correction to be deferred.