Myocardia ischemia associated 1 with a myocardial bridge with no significant atherosclerotic stenosis

25 Myocardial bridge refers to the myocardial tissue with which the coronary artery is 26 partly covered. Though it has long been regarded to be benign, patients with 27 myocardial bridges may present with myocardial ischemia, acute coronary syndromes, 28 coronary spasm, sudden cardiac arrest or even sudden death. In present study, we 29 reviewed four cases with myocardial bridge and no stenosis of coronary artery, which 30 included acute coronary syndrome and sudden cardiac arrest. These cases indicated 31 that cardiac events in patients with myocardial bridge may be associated with 32 coronary spasm, myocardial supply/demand mismatch or cardiac arrest. 33 34