title: The relationship between T-wave peak-to end interval and ST segment recovery on intracoronary ECG during primary PCI.
abstract: OBJECTIVE
  T-wave peak to end interval (TPE) is a measure of repolarization dispersion, which has been reported as a major arrhythmogenic factor post acute myocardial infarction. The aim of our study was to investigate the changes in TPE in this patient population with regard to peri-procedural intracoronary ECG findings.
  
  
  METHODS
  Forty-four patients (34 male and mean age of 54.9 ± 10.9 years) with acute STEMI were included. Intracoronary ECG was performed during primary PCI. TPE indices were calculated before and after the procedure. Measurement of the intracoronary ST-segment was carried out before and just after coronary blood flow was established in the infarct related artery. Intracoronary ST-segment resolution (IC-STR) was defined as ≥ 1 mm compared to baseline.
  
  
  RESULTS
  There was no difference with respect to baseline characteristics when patients with IC-STR were compared with patients without IC-STR. TPE values decreased significantly after primary PCI in patients with IC-STR (80.9 ± 22.8 ms vs. 65.8 ± 14.4 ms; p < 0.001) whereas they did not change significantly after PCI in patients without IC-STR (79.2 ± 20.9 ms vs. 68.5 ± 16.3 ms; p = 0.18).
  
  
  CONCLUSIONS
  TPE measured from surface ECG recordings is significantly reduced in STEMI patients with successful reperfusion after primary PCI, as determined by IC-ECG recordings.
authors: Department of Cardiology, Istanbul University, School of Medicine, Istanbul, Turkey. samim03@hotmail.com.
authors: A
authors: A
authors: Elitok
authors: B
authors: B
authors: Ikitimur
authors: I
authors: I
authors: Onur
authors: F
authors: F
authors: Oz
authors: S
authors: S
authors: Emet
authors: E B
authors: EB
authors: Karaayvaz
authors: N G
authors: NG
authors: Serbest
authors: R
authors: R
authors: Sarikaya
authors: K
authors: K
authors: Kasali
authors: A K
authors: AK
authors: Bilge
authors: M G
authors: MG
authors: Kaya
authors: F
authors: F
authors: Mercanoglu
authors: H
authors: H
authors: Oflaz
mesh_terms: D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery; D053840:Brugada Syndrome; D000075224:Cardiac Conduction System Disease; D004562:Electrocardiography / Q000639:trends*; D005260:Female; D006329:Heart Conduction System / Q000002:abnormalities / Q000503:physiopathology / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000175:diagnosis / Q000503:physiopathology* / Q000601:surgery*; D062645:Percutaneous Coronary Intervention / Q000639:trends*; D011446:Prospective Studies; D020127:Recovery of Function / Q000502:physiology*; D016896:Treatment Outcome