Intermittent obstruction of the left coronary artery ostia by a congenital supravalvular aortic membrane in an adult.

Left main coronary artery obstruction due to a congenital supra-aortic membrane is a rare anomaly, but it can have serious consequences, including significant myocardial ischemia that may result in impaired ventricular function or even sudden death. Therefore, early diagnosis and treatment of this condition are crucial for improving patient outcomes. We present, in this report, a patient with intermittent obstruction of the left coronary arteries caused by a congenital ostial membrane diagnosed in adulthood that resulted in myocardial ischemia.