Systolic coronary arterial narrowing, secondary to myocardial bridging which is capable of producing chest pain, myocardial infarction and ventricular fibrillation is a known but an uncommon entity. A supra-arterial myotomy in a case of myocardial bridge causing medication-refractory angina is described. Under the partial sternotomy incision, we performed a supra-arterial myotomy in the left anterior descending coronary artery without cardiopulmonary bypass. The postoperative course was uneventful.