title: Predictors and clinical implications of minimal ST-segment elevation in patients with ST-segment elevation myocardial infarction.
abstract: OBJECTIVE
  Some patients with suspected ST-segment elevation (STE) myocardial infarction (STEMI) show STE that does not fulfill the current criteria for STEMI. The purpose of this study was to investigate the characteristics and prognoses of patients with minimal STEMI.
  
  
  METHODS
  Between November 2007 and December 2011, 546 patients who underwent primary percutaneous coronary intervention (PCI) for STEMI were enrolled.
  
  
  RESULTS
  The minimal STE group had a higher proportion of women (30.2 vs. 21.0%, p = 0.031), better pre-PCI antegrade flow (Thrombolysis in Myocardial Infarction flow 2-3, 30.2 vs. 18.8%, p = 0.006) and better collateralization (Rentrop score 2-3, 27.4 vs. 18.1%, p = 0.024) compared to the definite STE group. Multivariate analysis showed that each of them were independent predictors for minimal STE. However, 1-year mortality of the minimal STE group did not differ from that of the definite STE group (7.1 vs. 9.3%, log-rank p = 0.315).
  
  
  CONCLUSIONS
  Female gender, good collateral flow and good pre-PCI antegrade flow were independent predictors for minimal STE in patients with STEMI. However, minimal STE was not related to a good prognosis in patients with STEMI.
authors.affiliation: Department of Internal Medicine, Kyungpook National University Hospital, Daegu, Republic of Korea.
authors.forename: Se Yong
authors.initials: SY
authors.lastname: Jang
authors.forename: Myung Hwan
authors.initials: MH
authors.lastname: Bae
authors.forename: Jae Hee
authors.initials: JH
authors.lastname: Kim
authors.forename: Sun Hee
authors.initials: SH
authors.lastname: Park
authors.forename: Jang Hoon
authors.initials: JH
authors.lastname: Lee
authors.forename: Dong Heon
authors.initials: DH
authors.lastname: Yang
authors.forename: Hun Sik
authors.initials: HS
authors.lastname: Park
authors.forename: Yongkeun
authors.initials: Y
authors.lastname: Cho
authors.forename: Shung Chull
authors.initials: SC
authors.lastname: Chae
mesh_terms: D000367:Age Factors; D001794:Blood Pressure / Q000502:physiology; D003097:Collateral Circulation / Q000502:physiology; D017023:Coronary Angiography; D003326:Coronary Circulation / Q000502:physiology; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000401:mortality / Q000601:surgery; D062645:Percutaneous Coronary Intervention; D011379:Prognosis; D012189:Retrospective Studies; D012737:Sex Factors; D061665:Time-to-Treatment