title: Perioperative myocardial infarction in patients undergoing myocardial revascularization surgery.
abstract: BACKGROUND
  Perioperative myocardial infarction adversely affects the prognosis of patients undergoing coronary artery bypass graft and its diagnosis was hampered by numerous difficulties, because the pathophysiology is different from the traditional instability atherosclerotic and the clinical difficulty to be characterized.
  
  
  OBJECTIVE
  To identify the frequency of perioperative myocardial infarction and its outcome in patients undergoing coronary artery bypass graft.
  
  
  METHODS
  Retrospective cohort study performed in a tertiary hospital specialized in cardiology, from May 01, 2011 to April 30, 2012, which included all records containing coronary artery bypass graft records. To confirm the diagnosis of perioperative myocardial infarction criteria, the Third Universal Definition of Myocardial Infarction was used.
  
  
  RESULTS
  We analyzed 116 cases. Perioperative myocardial infarction was diagnosed in 28 patients (24.1%). Number of grafts and use and cardiopulmonary bypass time were associated with this diagnosis and the mean age was significantly higher in this group. The diagnostic criteria elevated troponin I, which was positive in 99.1% of cases regardless of diagnosis of perioperative myocardial infarction. No significant difference was found between length of hospital stay and intensive care unit in patients with and without this complication, however patients with perioperative myocardial infarction progressed with worse left ventricular function and more death cases.
  
  
  CONCLUSIONS
  The frequency of perioperative myocardial infarction found in this study was considered high and as a consequence the same observed average higher troponin I, more cases of worsening left ventricular function and death.
authors: Hospital São José, Criciúma, SC, Brazil.
authors: Pericles
authors: P
authors: Pretto
authors: Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors: Gerez Fernandes
authors: GF
authors: Martins
authors: Universidade do Extremo Sul Catarinense, Criciúma, SC, Brazil.
authors: Andressa
authors: A
authors: Biscaro
authors: Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
authors: Dany David
authors: DD
authors: Kruczan
authors: Universidade Gama Filho Curso, Rio de Janeiro, RJ, Brazil.
authors: Barbara
authors: B
authors: Jessen
mesh_terms: D000328:Adult; D000368:Aged; D002423:Cause of Death; D001026:Coronary Artery Bypass / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007362:Intensive Care Units; D007902:Length of Stay; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000097:blood / Q000209:etiology*; D059035:Perioperative Period; D012189:Retrospective Studies; D013997:Time Factors; D016896:Treatment Outcome; D019210:Troponin I / Q000097:blood; D016277:Ventricular Function, Left
chemical_list: D019210:Troponin I