ABSTRACT
The coranary artery aneurysm reports are searce in medical literature and habitually related with the atherosclerotic or degeneratives etiology in function of the primary or secundary arteritis. Among the cases described by the literature, the aneurisms it's more in reght coronary artery. The authors report a case of patient with premature precordialgy and miocardic isquemic symptomas. The coronary angiography demonstrated anterior descending artery aneurysm with diagonal branch. Didn't present arteriopaty signs in orthers coraonary organics systems and neither symptomas of the arteritis or sepsis history related with micotic etiology. Electtivally accomplished with cardiopulmonary bypass the aneurysm resection and posteriorly anterior descending artery revascularization with left internal mammary artery graft and first diagonal branch with saphenous vein grafts. The operative elapsed not problems and pacient stayed in hospital for seven days. Actually, it is on tenth month of the attendance with good evolution