Myocardial bridging is a congenital anomaly of the coronary arteries, where a band of heart muscle tunnels through the myocardium instead of resting under epicardium, due to such conditions the artery constricts as the heart squeezes the blood to pump. The case of acute coronary syndrome without ST segment elevation is presented. The patient 44 years old was admitted to coronary care unit at emergency care hospital with suspected acute myocardial infarction. During the angiography myocardial bridging was diagnosed in the anterior interventricular branch of the left coronary artery which was the cause of retrosternal pain.
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