title: Optimal Medical Therapy vs. Percutaneous Coronary Intervention for Patients With Coronary Chronic Total Occlusion - A Propensity-Matched Analysis.
abstract: BACKGROUND
  Limited data are available on the long-term clinical outcomes of coronary chronic total occlusion (CTO) patients who receive optimal medical therapy (OMT) compared with percutaneous coronary intervention (PCI).
  
  
  RESULTS
  Between March 2003 and February 2012, 2,024 patients with CTO were enrolled in a single-center registry. Among this patient group, we excluded CTO patients who underwent coronary artery bypass grafting and classified patients into the OMT group (n=664) or PCI group (n=883) according to initial treatment strategy. Propensity-score matching was also performed. The primary outcome was cardiac death. The median follow-up duration was 45.8 (interquartile range: 22.8-71.1) months. In the PCI group, 699 patients (79.2%) underwent successful revascularization. In the propensity-score matched population (533 pairs), there was no significant difference in the rate of cardiac death between the OMT and PCI groups (hazard ratio, 1.57; 95% confidence interval, 0.91-2.72, P=0.11). In the subgroup analysis, there were no significant interactions between the PCI strategy and cardiac death among several subgroups except that regarding collateral flow grades 0-2 vs. those with grade 3 (P=0.01).
  
  
  CONCLUSIONS
  As an initial treatment strategy, PCI did not reduce cardiac death compared with OMT for the treatment of CTO in the drug-eluting stent era.
authors.affiliation: Division of Cardiology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine.
authors.forename: Jeong Hoon
authors.initials: JH
authors.lastname: Yang
authors.forename: Bum Sung
authors.initials: BS
authors.lastname: Kim
authors.forename: Woo Jin
authors.initials: WJ
authors.lastname: Jang
authors.forename: Joonghyun
authors.initials: J
authors.lastname: Ahn
authors.forename: Taek Kyu
authors.initials: TK
authors.lastname: Park
authors.forename: Young Bin
authors.initials: YB
authors.lastname: Song
authors.forename: Joo-Yong
authors.initials: JY
authors.lastname: Hahn
authors.forename: Jin-Ho
authors.initials: JH
authors.lastname: Choi
authors.forename: Sang Hoon
authors.initials: SH
authors.lastname: Lee
authors.forename: Hyeon-Cheol
authors.initials: HC
authors.lastname: Gwon
authors.forename: Seung-Hyuk
authors.initials: SH
authors.lastname: Choi
mesh_terms: D000368:Aged; D054059:Coronary Occlusion / Q000401:mortality* / Q000601:surgery*; D018572:Disease-Free Survival; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D062645:Percutaneous Coronary Intervention; D012042:Registries; D015996:Survival Rate