Teaching Point: Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA syndrome) is a rare congenital anomaly characterized by a steal phenomenon; it must be recognized, as a prompt treatment may prevent life-threatening complications such as myocardial infarction, mitral dysfunction, and malignant dysrhythmias in adults.
Keywords: ALCAPA syndrome; LCA steal phenomenon; coronary anomaly; myocardial infarction.
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