Abstract 14713: Long-Term Clinical Outcomes in Patients With Chronic Total Occlusion of Single Coronary Artery Treated With Percutaneous Coronary Intervention versus Optimal Medical Therapy: A Ten-Year Follow Up Study

Abstract

INTRODUCTION : Only limited data are available and long term follow up studies are insufficient about optimal treatment in patients with chronic total occlusion of a single coronary artery.METHODS : A total of 2,024 patients with CTO were retrospectively enrolled in Samsung Medical Center CTO registry between March 2003 and February 2012 and followed-up for 10 years. Patients underwent coronary artery bypass graft (n = 477) and Patients with multi-vessel CTO (n = 1,112) were excluded. Finally patients with chronic total occlusion of a single coronary artery (n = 435) were analyzed. Divided into two groups, optimal medical group (OMT, n = 147) and percutaneous coronary intervention group (PCI, n = 288) in accordance with initial treatment strategy. Cox regression analysis and propensity score matching was performed to adjust for confounding factors. Primary outcome was cardiac death.RESULT : During the follow up 10 years, we identified that there were no significant differences between OMT group and PCI group in rate of cardiac death (adjusted HR, 0.57 [95% CI, 0.26-1.24]; P=0.16) as well as rate of major adverse cardiac event (adjusted HR, 0.79 [95% CI, 0.52-1.19]; P=0.26) . After propensity score matching analyses, OMT group and PCI group still have no significant differences in rate of cardiac death (adjusted HR, 0.54 [95% CI, 0.24-1.19]; P=0.13) and rate of MACE (adjusted HR, 0.97 [95% CI, 0.62-1.52]; P=0.89).CONCLUSION : This retrospective observational study supported that as an initial treatment strategy in patients of single vessel CTO, PCI did not decrease the rate of cardiac death or MACE. KEYWORD : Chronic total occlusion, Optimal medical treatment, Percutaneous coronary intervention