Efficacy of percutaneous coronary intervention on chronic total coronary occlusion

Objectives To evaluate the effects and clinic outcomes of percutaneous coronary intervention(PCI) on chronic total occlusion(CTO) in coronary lesions.Methods The data of 233 patients undergoing PCI for a CTO before December 2006 were analyzed.Results PCI was performed successfully in 233 CTO patients with history of(20±10) months, including target vessels 251.Two hundred and sixty-six stents were implanted.Operative failures occurred in 7 patients, owing to failure to pass through the occlusion.The improvement rate of angina pectoris was 85.4%(P0.01) , while the improvement rate of cardiac functions was 79.6%(P0.01) , survival rate in five years was 88.9% .Conclusions Careful evaluation on CTO lesion is a key to obtain a relatively high success rate of PCI.Exquisite operating and select equipment are also important.A successful PCI for CTO improves the clinical symptoms and the life quality of patients.