title: The effect of postoperative gastrointestinal complications in patients undergoing coronary artery bypass surgery.
abstract: BACKGROUND
  Gastrointestinal (GI) complications after coronary artery bypass graft surgery (CABG) are uncommon but associated with a disproportionate share of mortality. We thus identified variables associated with GI complications and analyzed their effect on postoperative mortality in patients undergoing isolated CABG.
  
  
  METHODS
  Information from patients who underwent isolated CABG at our institution during a 12-year period was obtained from the Anesthesiology Institute patient registry. Patients who experienced one or more postoperative GI complication(s) during their initial intensive care unit stay were identified. Multivariable logistic regression with backward variable selection was used to determine variables associated with GI complications and to evaluate their effect on mortality.
  
  
  RESULTS
  Among 16,043 patients who underwent isolated CABG, 213 (1.43%) had one or more GI complication(s). The main patient variables associated with postoperative GI complications included preoperative (odds ratio, 2.43; 95% confidence interval [CI], 1.39 to 4.23; p < 0.001) and intraoperative (odds ratio, 5.07; 95% CI, 3.08 to 8.35; p < 0.001) intraaortic balloon pump insertion, patient age (odds ratio, 1.65; 95% CI, 1.41 to 1.94; p < 0.001), intraoperative fresh-frozen plasma transfusion (odds ratio, 3.38; 95% CI, 2.12 to 5.41; p < 0.001), and cardiogenic shock (odds ratio, 3.04; 95% CI, 1.12 to 8.24). No difference was detected in complication rates between off-pump and on-pump CABG procedures (1.50% versus 1.30%, respectively; p = 0.63). Postoperative GI complication(s) after CABG was associated with a 12.98 times increase in mortality (p < 0.001).
  
  
  CONCLUSIONS
  This single-center cohort study indicates that GI complications after isolated CABG remain rare with an incidence 1.43%. However, GI complications portend a significant mortality. The implications of intraoperative administration of fresh-frozen plasma and insertion of an intraaortic balloon pump deserve further investigation as they are associated with GI complications.
authors.affiliation: Department of Cardiothoracic Anesthesia, Cleveland Clinic, Cleveland, Ohio 45195, USA. diazj@ccf.org
authors.forename: José L
authors.initials: JL
authors.lastname: Díaz-Gómez
authors.forename: Benjamin
authors.initials: B
authors.lastname: Nutter
authors.forename: Meng
authors.initials: M
authors.lastname: Xu
authors.forename: Daniel I
authors.initials: DI
authors.lastname: Sessler
authors.forename: Colleen Gorman
authors.initials: CG
authors.lastname: Koch
authors.forename: Joseph
authors.initials: J
authors.lastname: Sabik
authors.forename: C Allen
authors.initials: CA
authors.lastname: Bashour
mesh_terms: D000368:Aged; D015331:Cohort Studies; D001026:Coronary Artery Bypass / Q000009:adverse effects* / Q000401:mortality; D005260:Female; D005767:Gastrointestinal Diseases / Q000209:etiology / Q000401:mortality*; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D012307:Risk Factors