Aims: Coronary slow flow (CSF) phenomenon is described by angiographically normal coronary arteries with delayed opacification of the distal vasculature. 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 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 ventricular repolarization by using Tp-Te interval and Tp-Te/QT ratio in patients with CSF.
Materials and Method: This study included 50 CSF patients (40 male, mean age 48,6±12,5 years) and 40 control person (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 between 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).
Conclusion: Our study revealed that QTd, Tp-Te interval and Tp-Te/QT ratio are prolonged in patients with CSF.