title: Early Postoperative Outcome of Off-Pump Coronary Artery Bypass Grafting: A Report from the Highest-Volume Center in Japan.
abstract: BACKGROUND
  Off-pump coronary artery bypass grafting (OPCAB) has evolved into a standard technique in coronary artery bypass grafting. However, a detailed investigation in Japanese population undergoing OPCAB has not yet been fully elucidated.
  
  
  METHODS
  A total of 1109 consecutive patients undergoing isolated OPCAB between 2006 and 2013 at Juntendo University were reviewed. The data was evaluated in the light of previously published OPCAB-associated reports.
  
  
  RESULTS
  There were 904 male (81.5%) and a mean was 67.5 ± 9.8 years. Eight patients (0.5%) died within 30 days postoperatively or before discharge, which was equivalent to or rather better than the previously reported mortality rates, including the European System for Cardiac Operation Risk Evaluation II (2.1 ± 2.1) data. A morbidity analysis revealed that prolonged intubation (>24 h) occurred in 43 patients (3.6%), surgical site infections in 18 (1.9%), neurological complications in 13 (1.3%). A reduced preoperative left ventricular ejection fraction (less than 40%) was found to be a risk factor for early postoperative death (odds ratio 10.58, respectively, p <0.05) in our cohort.
  
  
  CONCLUSIONS
  Early postoperative mortality and morbidity rates in Japanese population after OPCAB were rather satisfactory and similar to those reported by other countries.
authors.affiliation: Department of Cardiovascular Surgery, Juntendo University School of Medicine, Tokyo, Japan.
authors.forename: Kishio
authors.initials: K
authors.lastname: Kuroda
authors.forename: Tomoko S
authors.initials: TS
authors.lastname: Kato
authors.forename: Kenji
authors.initials: K
authors.lastname: Kuwaki
authors.forename: Kan
authors.initials: K
authors.lastname: Kajimoto
authors.forename: Seitetsu L
authors.initials: SL
authors.lastname: Lee
authors.forename: Taira
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Atsushi
authors.initials: A
authors.lastname: Amano
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015331:Cohort Studies; D047549:Coronary Artery Bypass, Off-Pump / Q000009:adverse effects / Q000401:mortality; D003324:Coronary Artery Disease / Q000401:mortality / Q000601:surgery*; D016208:Databases, Factual; D005260:Female; D017052:Hospital Mortality; D061847:Hospitals, High-Volume; D006785:Hospitals, University; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D011183:Postoperative Complications / Q000209:etiology / Q000401:mortality; D017064:Process Assessment, Health Care; D012307:Risk Factors; D013997:Time Factors; D016896:Treatment Outcome