title: Evaluation of Tp-Te Interval and Tp-Te/QT Ratio in Patients with Coronary Slow Flow Tp-Te/QT Ratio and Coronary Slow Flow.
abstract: OBJECTIVE
  Coronary slow flow (CSF) phenomenon is described by angiographically normal coronary arteries with delayed opacification of the distal vasculature. Several studies have suggested that the interval from the peak to the end of the electrocardiographic T wave (Tp-Te) may correspond to the transmural dispersion of the repolarization and that increased Tp-Te interval and Tp-Te/QT ratio are associated with malignant ventricular arrhythmias. The aim of this study was to evaluate the ventricular repolarization by using Tp-Te interval and Tp-Te/QT ratio in patients with CSF.
  
  
  METHODS
  This study included 50 CSF patients (40 male, mean age 48.6±12.5 years) and 40 control individuals (23 male, mean age 47.8±12.5 years). Tp-Te interval and Tp-Te/QT ratio were measured from the 12-lead electrocardiogram. These parameters were compared in groups.
  
  
  RESULTS
  Baseline characteristics of the study groups were comparable. In electrocardiographic parameters analysis, QT and corrected QT were similar in CSF patients compared to the controls (357±35.2 vs 362±38.0 milliseconds and 419±25.8 vs 430±44.2 milliseconds, all p value >0.05). Tp-Te interval, Tp-Te/QT and Tp-Te/QTc ratio were significantly higher in CSF patients (85±13.7 vs 74±9.9 milliseconds and 0.24±0.03 vs 0.20±0.02 and 0.20±0.03 vs 0.17±0.02 all p value <0.001).
  
  
  CONCLUSIONS
  Our study revealed that QTd, Tp-Te interval and Tp-Te/QT ratio are prolonged in patients with CSF.
authors.affiliation: Clinic of Cardiology, Bursa Yuksek Ihtisas Training and Research Hospital, Bursa, Turkey.
authors.forename: Erhan
authors.initials: E
authors.lastname: Tenekecioglu
authors.affiliation: Clinic of Cardiology, Bursa Yuksek Ihtisas Training and Research Hospital, Bursa, Turkey.
authors.forename: Kemal
authors.initials: K
authors.lastname: Karaagac
authors.affiliation: Clinic of Cardiology, Bursa Yuksek Ihtisas Training and Research Hospital, Bursa, Turkey.
authors.forename: Osman Can
authors.initials: OC
authors.lastname: Yontar
authors.affiliation: Clinic of Cardiology, Bursa Yuksek Ihtisas Training and Research Hospital, Bursa, Turkey.
authors.forename: Fahriye Vatansever
authors.initials: FV
authors.lastname: Agca
authors.affiliation: Clinic of Cardiology, Bursa Yuksek Ihtisas Training and Research Hospital, Bursa, Turkey.
authors.forename: Ozlem Arican
authors.initials: OA
authors.lastname: Ozluk
authors.affiliation: Clinic of Cardiology, Bursa Yuksek Ihtisas Training and Research Hospital, Bursa, Turkey.
authors.forename: Ahmet
authors.initials: A
authors.lastname: Tutuncu
authors.affiliation: Clinic of Cardiology, Bursa Yuksek Ihtisas Training and Research Hospital, Bursa, Turkey.
authors.forename: Burhan
authors.initials: B
authors.lastname: Arslan
authors.affiliation: Clinic of Cardiology, Bursa Yuksek Ihtisas Training and Research Hospital, Bursa, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Yilmaz
keywords: Coronary slow flow; Tp-Te interval; Tp-Te/QT ratio; arrhythmia