Association Between Tp‐e/QT Ratio and Prognosis in Patients Undergoing Primary Percutaneous Coronary Intervention for ST‐Segment Elevation Myocardial Infarction

Abstract

The Tp-e/QT ratio may serve as a prognostic predictor of adverse outcomes after successful pPCI treatment in STEMI patients.

Prolonged Tp-e interval and Tp-e/QT correlates well with modified Rodnan skin severity score in patients with systemic sclerosis

“…ESR Sercan Okutucu et al, Prolonged Tp-e and Tp-e/QT in systemic sclerosis this ratio is being used increasingly more frequently as an electrocardiographic index of ventricular arrhythmogenesis in various diseases. Previous studies have shown that prolongation of the Tp-e interval is associated with increased mortality in Brugada syndrome, hypertrophic cardiomyopathy, and in patients undergoing primary percutaneous coronary intervention for myocardial infarction [13,22,23]. Yamaguchi et al [24] found that the Tp-e/QT ratio is a superior predictor of torsades de pointes than either QTc interval or QTd in patients with long QT syndrome (LQTS).…”

“…However, the Tp-e and QT intervals might be affected by variations of body mass index (BMI) and heart rate (HR) [12]. Recently a new index, the Tp-e/QT ratio, has been suggested to be a more accurate measure of dispersion of ventricular repolarization compared to QT and Tp-e intervals, and to be independent of alterations in HR [12,13].…”

The Relationship between Ventricular Repolarization Indexes and Neutrophil to Lymphocyte Ratio in Patients with Slow Coronary Flow

“…It has been shown that the QT interval lengthened and QTd increased after sympathetic system activity or catecholamine discharge [28]. The Tp-e interval and Tp-e/QT ratio have been used as indices of ventricular repolarization to predict ventricular arrhythmias and sudden cardiac death [13][14][15][16][17]. Several investigators have studied repolarization patterns in patients with SCF and have shown that QTd, Tp-e interval and Tp-e/QT ratio were increased compared to controls [11,29].…”

“…However, changes in body weight and heart rate affect the Tp-e interval [16]. To address this issue, the Tp-e/QT ratio was suggested as a more accurate measure for the dispersion of ventricular repolarization compared to QTd, corrected QTd, and Tp-e intervals, and to be independent of alterations in heart rate [16,17]. The total white blood cell (WBC) count and its subtypes, such as neutrophil, lymphocyte, and neutrophil/lymphocyte ratio (NLR), can be used as an indicator of systemic inflammation [18].…”

Evaluation of Tp-Te Interval and Tp-Te/QT Ratio in Patients with Coronary Slow Flow Tp-Te/QT Ratio and Coronary Slow Flow

“…Also, these markers may be used as an electrocardiographic index of ventricular arrhythmogenesis and sudden cardiac death [10,12]. Previous studies showed that prolongation of Tp-Te interval was associated with increased mortality in Brugada syndrome, long QT syndrome, hypertrophic cardiomyopathy, and in patients myocardial infarction [12,14,20].…”