Abstract: A52-year-old man presented with a history of angina pectoris over 3 months. He had a history of hypertension and hyperlipidemia. His physical examination,blood chemistry,ECG,chest X-ray were normal.A treadmill exercise ECG test was performed using the Bruce protocol.Owing to 1 mm ST segment depressions at derivations DⅡ,DⅢ,aVF,V4-V6,and typical chest pain at third stage the test was evaluated as ischemia-positive test.Therefore,he was scheduled for