Hypertrophic cardiomyopathy after Takeuchi procedure for anomalous origin of the left coronary artery from the pulmonary artery syndrome

Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) syndrome is a rare condition. Surgical intervention is indicated in all diagnosed patients. Successful repair is expected to correct left ventricle (LV) functions and heart failure, reduce mitral regurgitation, and resolve infarct patterns observed on electrocardiogram. For this reason, compared to idiopathic dilated cardiomyopathy, ALCAPA is considered a curable form of dilated cardiomyopathy. In this article, we present the case of 3-month-old girl who underwent the Takeuchi procedure for ALCAPA syndrome and developed hypertrophic cardiomyopathy despite expectations of improved LV function.