[Origin of the left coronary artery from the trunk of the pulmonary artery. Report of a case]. / Origen de la arteria coronaria izquierda del tronco de la arteria pulmonar. Informe de un caso.

The congenital anomalies of the coronary arteries are varied. The left trunk arising from the pulmonary artery is a rare and serious one. With coronary angiography the diagnosis is possible. The surgical technics offer an effective treatment. We report the first case with these anomalies at the Instituto Nacional de Cardiología Ignacio Chávez. It was diagnosed with coronary angiography and it was treated by suturing the left main coronary artery in its origin, and with implantation of a safenous vein graft between the aorta and the left main coronary artery. The results were satisfactory.