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BACKGROUND:Myocardial bridging (MB) is a common congenital abnormality of a coronary artery.Although rare,previous studies have reported that patients with myocardial bridging may suffer from myocardial ischemia,myocardial infarction, arrhythmias and even sudden death.Multidetector-row computed tomography (MDCT)had been used for MB diagnose more and more.With the advent of dual-source CT (DSCT), it may be feasible to evaluate dynamic changes of MB by CTA and the multiplanar reconstruction.