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In children, myocardial bridge is an inborn coronary anomaly and is usually found in the patients with hypertrophic cardiomyopathy or left ventricular hypertrophy. Myocardial bridges were long thought to be a benign anatomical variant, even in patients with obstructive and non-obstructive hypertrophic cardiomyopathy. However some patients suffer from myocardial infarction, arrhythmia and even sudden cardiac death. In the present report, we describe a 7-year-old girl with the manifestation of recurrent precordial discomfort, and subsequently diagnosed as having an isolated myocardial bridge in the distal segment of left anterior descending coronary artery using 64-slice computed tomography coronary angiography.