title: The role of EuroSCORE in patients undergoing off-pump coronary artery bypass.
abstract: BACKGROUND
  European System for Cardiac Operative Risk Evaluation (EuroSCORE) has been used to predict the postoperative mortality rate for patients undergoing open-heart surgery. The contributions of EuroSCORE in off-pump coronary artery bypass grafting (CABG) has not yet clearly elucidated.
  
  
  METHODS
  Consecutive patients of isolated off-pump CABG performed from 2000 when we start performing 'routine' off-pump procedures were stratified using the additive EuroSCORE. Incidence of postoperative mortality, morbidity, and recovery were assessed, and compared to an historical cohort of on-pump procedures performed between 1991 until 1998 when CABG had been routinely performed under on-pump.
  
  
  RESULTS
  There were 1318 patients in the off-pump and 1162 patients in the on-pump group. EuroSCORE of the off-pump group was significantly higher than that of the on-pump group. In both the on- and off-pump groups, mortality, total incidence of major complications, heart failure, and renal failure, and three parameters of recovery time were well correlated with EuroSCORE; however, the discriminatory power of the EuroSCORE model was always better in the on-pump group than in the off-pump group. Stroke was correlated with EuroSCORE only in the on-pump group. Pneumonia, mediastinitis postoperative myocardial infarction, or mediastinitis was not correlated with EuroSCORE in either group. In the off-pump group, postoperative major complication was reduced and postoperative recovery was shortened significantly, compared to those in the on-pump group.
  
  
  CONCLUSIONS
  In off-pump CABG, EuroSCORE can, but not as good as in on-pump CABG, predict mortality, certain major postoperative complications, and postoperative recovery. This suggests off-pump technique appears to modify the risk stratification of the patients undergoing CABG.
authors.affiliation: Department of Cardiovascular Surgery, Juntendo University Hospital, Bunko-ku, Tokyo, 113-8421, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Hirose
authors.forename: Chiaki
authors.initials: C
authors.lastname: Noguchi
authors.forename: Hirotaka
authors.initials: H
authors.lastname: Inaba
authors.forename: Keiichi
authors.initials: K
authors.lastname: Tambara
authors.forename: Taira
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Motoshige
authors.initials: M
authors.lastname: Yamasaki
authors.forename: Keita
authors.initials: K
authors.lastname: Kikuchi
authors.forename: Atsushi
authors.initials: A
authors.lastname: Amano
mesh_terms: D017677:Age Distribution; D000368:Aged; D000714:Anastomosis, Surgical / Q000009:adverse effects / Q000379:methods; D002423:Cause of Death; D015331:Cohort Studies; D001026:Coronary Artery Bypass / Q000009:adverse effects / Q000379:methods / Q000401:mortality; D047549:Coronary Artery Bypass, Off-Pump / Q000009:adverse effects / Q000379:methods / Q000401:mortality*; D023921:Coronary Stenosis / Q000000981:diagnostic imaging / Q000401:mortality / Q000601:surgery*; D016208:Databases, Factual; D005260:Female; D006084:Graft Rejection; D006085:Graft Survival; D017052:Hospital Mortality / Q000639:trends; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000175:diagnosis / Q000401:mortality*; D011237:Predictive Value of Tests; D011336:Probability; D011859:Radiography; D012189:Retrospective Studies; D018570:Risk Assessment; D012720:Severity of Illness Index; D017678:Sex Distribution; D016019:Survival Analysis