title: Unstable angina does not increase mortality in coronary artery bypass graft surgery.
abstract: BACKGROUND
  Coronary artery bypass graft is often the treatment of choice for patients who suffer from unstable angina. We do not know whether this condition adds morbidity in this scenario.
  
  
  OBJECTIVE
  To compare the outcomes of patients undergoing coronary artery bypass graft with unstable angina framework with patients who underwent coronary artery bypass graft showed no unstable angina.
  
  
  METHODS
  Retrospective cohort study. Unstable angina was defined as acute coronary syndrome without ST elevation and without enzymatic alteration and/or class IV angina.
  
  
  RESULTS
  Between February 1996 and July 2010, to 2,818 isolated coronary artery bypass graft performed, 1,016 (36.1%) patients had unstable angina. Multivariate analysis showed that patients with preoperative unstable angina used more medications such as acetylsalicylic acid, beta-blocker, heparin (anticoagulation), nitrate and less need for diuretics than patients without unstable angina. Patients with unstable angina used increased monitoring with Swan-Ganz and support with intra-aortic balloon than stable patients. On outcomes, required longer hospitalization (P=0.030) and had a lower death rate (P=0.018) in the post-coronary artery bypass graft alone.
  
  
  CONCLUSIONS
  Submit patients to coronary artery bypass graft in the presence of acute coronary syndrome such as unstable angina did not increase the mortality rate.
authors.forename: Carolina Pelzer
authors.initials: CP
authors.lastname: Sussenbach
authors.forename: João Carlos
authors.initials: JC
authors.lastname: Guaragna
authors.forename: Rômulo Soares
authors.initials: RS
authors.lastname: Castagnino
authors.forename: Jaqueline
authors.initials: J
authors.lastname: Piccoli
authors.forename: Luciano Cabral
authors.initials: LC
authors.lastname: Albuquerque
authors.forename: Marco Antônio
authors.initials: MA
authors.lastname: Goldani
authors.forename: João Batista
authors.initials: JB
authors.lastname: Petracco
authors.forename: Luiz Carlos
authors.initials: LC
authors.lastname: Bodanese
mesh_terms: D000368:Aged; D000789:Angina, Unstable / Q000150:complications / Q000401:mortality*; D001026:Coronary Artery Bypass / Q000401:mortality*; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D059035:Perioperative Period; D012189:Retrospective Studies; D018570:Risk Assessment; D012307:Risk Factors; D012737:Sex Factors; D016896:Treatment Outcome