Clinical significance of coronary myocardial bridge

Objective:To discuss the clinical significance of coronary myocardial bridge.Methods:Clinical and angiographic datum of 82 patients with coronary myocardial bridge in 756 patients(10.8%) underwent selected coronary angiography were analyzed retrospectively.Results:The clinical features of the 82 patients with coronary myocardial bridge were stable angina(12.2%),unstable angina(40.2%),pain in thorax without knowing reasons(41.5%),acute myocardial infarction(3.7%),hypertrophy cardiomyopath(2.4%).In 23(28.0%) patients,coronary stenosis was found in the segment proximal to the myocardial bridge.In 3(3.7%) patients,coronary stenosis was found in the segment distal to the myocardial bridge.In 46(56.1%) patients,there was no coronary stenosis was found in the coronary artery involved in the myocardial bridge.Conclusion:The occurring rate of coronary myocardial bridge is relative high.Coronary myocardial bridge may cause myocardial ischemia and angina.Early and routine coronary angiography is necessary for diagnose coronary myocardial bridge in patients with angina pectoris.