title: The universal 2012 definition of myocardial infarction compared to the 2007 definition.
abstract: OBJECTIVE
  The third Universal 2012 definition of myocardial infarction (MI) has not been compared to the Universal 2007 definition with regard to the number of cases identified, classification and mortality.
  
  
  METHODS
  We examined potential MI events according to the two universal definitions in 1494 patients admitted to the University hospital during the 12 months. Patients were included either because of an MI discharge diagnosis (815 patients) or due to elevated troponin I levels without an MI discharge diagnosis (679 patients).
  
  
  RESULTS
  Applying the Universal 2012 definition resulted in 760 of the 1494 patients suffering from MI, as compared to 769 according to the Universal 2007 definition. The lower number of MI events applying the 2012 definition was mainly explained by the stricter definition of Type 4a MI. The 760 MI events were classified as Type 1 (685), 2 (27), 3 (28), 4a (13), 4b (3) and 5 (4).
  
  
  CONCLUSIONS
  The application of the third Universal 2012 definition of MI instead of the Universal 2007 definition resulted in a 1% reduction of the total number of MIs. For a practical clinical purpose, the reduction was confined to patients with Type 4a MI. The change of definition had no impact on all-cause mortality.
authors.affiliation: a Department of Heart Disease , Haukeland University Hospital , Bergen , Norway ;
authors.forename: Jørund
authors.initials: J
authors.lastname: Langørgen
authors.affiliation: b Department of Health Registries , Norwegian Institute of Public Health , Bergen , Norway ;
authors.forename: Marta
authors.initials: M
authors.lastname: Ebbing
authors.affiliation: c Department of Global Public Health and Primary Care , University of Bergen , Bergen , Norway ;
authors.forename: Jannicke
authors.initials: J
authors.lastname: Igland
authors.affiliation: d Department of Clinical Science , University of Bergen , Bergen , Norway ;
authors.forename: Jan Erik
authors.initials: JE
authors.lastname: Nordrehaug
authors.affiliation: c Department of Global Public Health and Primary Care , University of Bergen , Bergen , Norway ;|e Norwegian Institute of Public Health , Bergen , Norway.
authors.forename: Stein Emil
authors.initials: SE
authors.lastname: Vollset
authors.affiliation: a Department of Heart Disease , Haukeland University Hospital , Bergen , Norway ;
authors.forename: Anne
authors.initials: A
authors.lastname: Kask
authors.affiliation: c Department of Global Public Health and Primary Care , University of Bergen , Bergen , Norway ;|e Norwegian Institute of Public Health , Bergen , Norway.
authors.forename: Grethe S
authors.initials: GS
authors.lastname: Tell
authors.affiliation: a Department of Heart Disease , Haukeland University Hospital , Bergen , Norway ;|d Department of Clinical Science , University of Bergen , Bergen , Norway ;
authors.forename: Ottar
authors.initials: O
authors.lastname: Nygård
mesh_terms: D000368:Aged; D002965:Classification / Q000379:methods; D015331:Cohort Studies; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D009203:Myocardial Infarction / Q000145:classification / Q000175:diagnosis / Q000401:mortality; D009664:Norway / Q000453:epidemiology; D012189:Retrospective Studies; D016019:Survival Analysis; D009626:Terminology as Topic; D019210:Troponin I / Q000032:analysis*
chemical_list: D019210:Troponin I
keywords: Hospitalized; mortality; myocardial infarction; number of events; universal definition