 Occlusive coronary artery disease is predominantly caused by coronary atherosclerosis, a pathologic vascular condition characterized by abnormal lipid and fibrous tissue accumulation in the vessel wall. This condition may be accompanied by degenerative changes andor calcification leading to stenosis narrowing of the luminal channel. Percutaneous Transluminal Coronary Angioplasty PTCA is a well-accepted method of non-surgical myocardial revascularization for selected patients with symptomatic occlusive coronary artery disease. 