Successful surgical repair of adult anomalous origin of the left main coronary artery from the pulmonary artery syndrome complicated by severe mitral regurgitation: a case report.

Because the mechanism of MR with ALCAPA in an adult varies by comorbidity, mitral valve repair should be performed according to the valvular and subvalvular morphologies. It is essential to develop strategies that provide adequate myocardial protection during the surgical treatment of ALCAPA considering coronary steal and non-coronary collateral blood flow.