title: Short- and long-term outcomes following atrial fibrillation in patients with acute coronary syndromes with or without ST-segment elevation.
abstract: OBJECTIVE
  To assess variables associated with the occurrence of atrial fibrillation (AF) and the relation of AF with short- and long-term outcomes and with other in-hospital complications in patients with acute coronary syndromes (ACS) with and without ST-segment elevation.
  
  
  METHODS
  Pooled database of 120 566 patients with ST-segment elevation myocardial infarction (STEMI) and non-ST-segment elevation (NSTE) ACS enrolled in 10 clinical trials. Multivariable logistic regression and Cox proportional hazards modelling were used to identify factors associated with AF and its relation with clinical outcomes.
  
  
  METHODS
  ACS complicated by AF.
  
  
  METHODS
  120,566 patients with STEMI and NSTE-ACS in 10 clinical trials.
  
  
  METHODS
  None evaluated.
  
  
  METHODS
  Short- and long-term mortality.
  
  
  RESULTS
  Occurrence of AF was 7.5% in the overall population (STEMI 8.0% (n = 84 161); NSTE-ACS = 6.4% (n = 36,405)). Seven-day mortality was higher for patients with AF (5.1%) than for those without (1.6%). After adjusting for confounders, association of AF with 7-day mortality was present in STEMI (hazards ratio (HR) = 1.65; 95% CI 1.44 to 1.90) and NSTE-ACS (HR = 2.30; 95% CI 1.83 to 2.90; p interaction = 0.015). Risk of long-term mortality (day 8 to 1 year) was also higher in STEMI (HR = 2.37; 95% CI 1.79 to 3.15) and NSTE-ACS (HR = 1.67; 95% CI 1.41 to 1.99). AF had a larger impact in NSTE-ACS on risk of short-term mortality (p<0.001), stroke (p<0.001), ischaemic stroke (p<0.001) and moderate or severe bleeding (p<0.001).
  
  
  CONCLUSIONS
  AF is more common in patients with STEMI. An association of AF with short- and long-term mortality among patients with STEMI and NSTE-ACS was found. Understanding these findings may lead to better care of patients with this common arrhythmia.
authors.affiliation: Duke Clinical Research Institute, Duke University Medical Center, 2400 Pratt Street, Room 0311 Terrace Level, Durham, NC 27707, USA.
authors.forename: R D
authors.initials: RD
authors.lastname: Lopes
authors.forename: K S
authors.initials: KS
authors.lastname: Pieper
authors.forename: J R
authors.initials: JR
authors.lastname: Horton
authors.forename: S M
authors.initials: SM
authors.lastname: Al-Khatib
authors.forename: L K
authors.initials: LK
authors.lastname: Newby
authors.forename: R H
authors.initials: RH
authors.lastname: Mehta
authors.forename: F
authors.initials: F
authors.lastname: Van de Werf
authors.forename: P W
authors.initials: PW
authors.lastname: Armstrong
authors.forename: K W
authors.initials: KW
authors.lastname: Mahaffey
authors.forename: R A
authors.initials: RA
authors.lastname: Harrington
authors.forename: E M
authors.initials: EM
authors.lastname: Ohman
authors.forename: H D
authors.initials: HD
authors.lastname: White
authors.forename: L
authors.initials: L
authors.lastname: Wallentin
authors.forename: C B
authors.initials: CB
authors.lastname: Granger
mesh_terms: D054058:Acute Coronary Syndrome / Q000188:drug therapy / Q000453:epidemiology* / Q000503:physiopathology; D000367:Age Factors; D000368:Aged; D001281:Atrial Fibrillation / Q000188:drug therapy / Q000453:epidemiology* / Q000503:physiopathology; D004562:Electrocardiography; D004812:Epidemiologic Methods; D005260:Female; D006760:Hospitalization; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000453:epidemiology / Q000503:physiopathology; D011379:Prognosis