title: Outcome of patients with low ejection fraction undergoing coronary artery bypass grafting: renal function and mortality after 3.8 years.
abstract: BACKGROUND
  There are few data regarding medium-term outcome of coronary artery bypass grafting (CABG) in patients with severe left ventricular (LV) systolic dysfunction, particularly in the modern era, and even less assessing preoperative factors that might identify patients at highest risk.
  
  
  RESULTS
  Three hundred seventy-nine consecutive patients with LV ejection fraction < or = 35%, who underwent isolated first CABG between 1995 and 1999 were studied. Potential preoperative and perioperative predictors of outcome were recorded and patients followed-up for a median of 3.8 years. The primary study end-point was all-cause mortality. The 30-day, 1-year, and 3-year survival rates were 94.5%, 88%, and 81%, respectively. The independent predictors of mortality were preoperative estimated glomerular filtration rate (hazard ratio [HR], 0.98; 95% confidence interval [CI], 0.97 to 0.99 per mL/min/1.73 m2; P<0.001) and age (HR, 1.03; 95% CI, 1.01 to 1.06 per year; P=0.005).
  
  
  CONCLUSIONS
  Patients with significant LV systolic dysfunction undergoing isolated CABG using contemporary techniques have a good medium-term survival. Renal dysfunction is the strongest independent predictor of mortality.
authors.affiliation: Division of Cardiovascular Diseases, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA.
authors.forename: Graham S
authors.initials: GS
authors.lastname: Hillis
authors.forename: Kenton J
authors.initials: KJ
authors.lastname: Zehr
authors.forename: Amy W
authors.initials: AW
authors.lastname: Williams
authors.forename: Hartzell V
authors.initials: HV
authors.lastname: Schaff
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Orzulak
authors.forename: Richard C
authors.initials: RC
authors.lastname: Daly
authors.forename: Charles J
authors.initials: CJ
authors.lastname: Mullany
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Rodeheffer
authors.forename: Jae K
authors.initials: JK
authors.lastname: Oh
mesh_terms: D000368:Aged; D002303:Cardiac Output, Low / Q000453:epidemiology*; D015331:Cohort Studies; D015897:Comorbidity; D001026:Coronary Artery Bypass / Q000706:statistics & numerical data; D003404:Creatinine / Q000097:blood; D005260:Female; D005500:Follow-Up Studies; D005919:Glomerular Filtration Rate; D006801:Humans; D007668:Kidney / Q000503:physiopathology*; D007676:Kidney Failure, Chronic / Q000453:epidemiology / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009026:Mortality; D013318:Stroke Volume; D016019:Survival Analysis; D015996:Survival Rate; D016896:Treatment Outcome; D018487:Ventricular Dysfunction, Left / Q000453:epidemiology*
chemical_list: D003404:Creatinine