Objective To explore the clinical and electrocardiography features of myocardial bridge.Methods The clinical and electrocardiography features of myocardial bridge were analyzed by Noble class in 65patients diagnosed on the basis of coronary angiography.Results Myocardial bridge was commonly located on cosco section of the anterior descending branch.By Noble class,31 cases were in level Ⅰ,and 34 cases were in level Ⅱ to Ⅲ.Resting electrocardiogram showed ST and/or T wave changed in 35cases(53.85%).The positi...