title: Postoperative atrial fibrillation following coronary artery bypass graft: clinical factors associated with in-hospital death.
abstract: OBJECTIVE
  To identify factors associated with a higher likelihood of in-hospital death in patients submitted to coronary artery bypass graft surgery (CABG) who developed atrial fibrillation (AF) postoperatively.
  
  
  METHODS
  The authors analyzed data from 397 consecutive patients submitted to CABG that developed AF postoperatively between 2000 and 2003. The patients were divided into 2 groups: group 1 (G1) comprised patients who survived (n=369); and group 2 (G2) comprised patients who died during hospital stay (n=28). Statistical analysis was performed using Student's t test and chi-square test, and p values < 0.05 were considered significant.
  
  
  RESULTS
  A comparative analysis between G1 and G2 showed that there was no difference between the groups as regards age (67.3 +/- 8.4 versus 69.3 +/- 9.6; p = 0.4), male gender (75.9% versus 64.3%; p = 0.1), systemic arterial hypertension (75.3% versus 85.7%; p = 0.2) and congestive heart failure (17% versus 17%; p = 1). Group 2 presented higher rates for previous acute myocardial infarction (14.6% versus 28.6%; p = 0.05), left ventricular ejection fraction < 40% (12.2% versus 32.1%; p = 0.003), previous cerebrovascular accident (0.8% versus 17.9%; p = 0.03), previous percutaneous coronary intervention (19.5% versus 39.3%; p = 0.01) and previous CABG (19.3% versus 35.7%; p = 0.03).
  
  
  CONCLUSIONS
  Clinical history of acute myocardial infarction, CABG, percutaneous coronary intervention, cerebrovascular accident and severe ventricular dysfunction were significantly more frequent in the group that died during hospital stay, which suggests a possible association of these factors with a higher likelihood of death following CABG.
authors.affiliation: Hospital do Coração, Associação do Sanatório Sírio, São Paulo, SP, Brasil. dinaldo@cardiol.br
authors.forename: Dinaldo Cavalcanti de
authors.initials: DC
authors.lastname: Oliveira
authors.forename: Carlos Romério
authors.initials: CR
authors.lastname: Ferro
authors.forename: João Bosco de
authors.initials: JB
authors.lastname: Oliveira
authors.forename: Guilherme Jose
authors.initials: GJ
authors.lastname: Prates
authors.forename: Audrey
authors.initials: A
authors.lastname: Torres
authors.forename: Enilton Sergio Tabosa do
authors.initials: ES
authors.lastname: Egito
authors.forename: Magali Santos
authors.initials: MS
authors.lastname: Arraes
authors.forename: Luis Carlos Bento de
authors.initials: LC
authors.lastname: Souza
authors.forename: Adib Domingos
authors.initials: AD
authors.lastname: Jatene
authors.forename: Leopoldo Soares
authors.initials: LS
authors.lastname: Piegas
mesh_terms: D000368:Aged; D000889:Anti-Arrhythmia Agents / Q000627:therapeutic use; D001281:Atrial Fibrillation / Q000188:drug therapy / Q000209:etiology / Q000401:mortality*; D002561:Cerebrovascular Disorders / Q000150:complications; D001026:Coronary Artery Bypass / Q000009:adverse effects; D003327:Coronary Disease / Q000175:diagnosis / Q000601:surgery*; D004812:Epidemiologic Methods; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D008297:Male; D009203:Myocardial Infarction / Q000150:complications; D011184:Postoperative Period; D013997:Time Factors; D018754:Ventricular Dysfunction / Q000150:complications
chemical_list: D000889:Anti-Arrhythmia Agents