Myocardia ischemia associated with a myocardial bridge with no significant atherosclerotic stenosis

Background: Myocardial bridge refers to the myocardial tissue with which the coronary artery is partly covered. Though it has long been regarded to be benign, patients with myocardial bridges may present with myocardial ischemia, acute coronary syndromes, coronary spasm, sudden cardiac arrest or even sudden death. Case presentation: In present study, we reviewed four cases with myocardial bridge and no stenosis of coronary artery, which included acute coronary syndrome and sudden cardiac arrest. Conclusions: These cases indicated that cardiac events in patients with myocardial bridge may be associated with coronary spasm, myocardial supply/ demand mismatch or cardiac arrest.