Angiographic features and clinical significance of coronary myocardial bridges

Objective To analyze the angiographic features of coronary myocardial bridge and evaluate its clinical significance. Methods Thirteen patients with myocardial bridge out of 618 cases undergoing selective coronary angiography were studied retrospectively. Results The incidence of myocardial bridge was 2 1% (13/618). In the 13 patients, every one had a single myocardial bridge, which involving the left anterior descending coronary artery in 12 patients and the left circumflex branch in one. Seven patients were diagnosed as simple myocardial bridge, and 3 accompanied with coronary atherosclerotic heart disease, 2 with hypertension and 1 with hypertrophic cardiomyopathy. All patients received medicine treatment and there were 2 patients undergoing coronary stenting. Conclusion The detectable rate of coronary myocardial bridges is quite low revealed by coronary angiography. Angiographically, myocardial bridge should be distinguished from coronary atherosclerosis and false myocardial bridges. Myocardial bridge patients with symptoms should be treated actively.