Long term follow-up in a case of anomalous origin of the left coronary artery from the pulmonary artery.

An adult patient with anomalous origin of the left coronary artery from the pulmonary artery had no serious cardiac event for 19 years after closing the shunt from the aorta to the pulmonary trunk by ligation of the left main coronary artery. Although one-coronary arterial perfusion is considered to have worse prognosis than two-coronary arterial system, this patient proved to have an unexpectedly good long-term prognosis.