BACKGROUND Type 2 diabetes mellitus (T2DM) is associated with increased risk of malignant ventricular arrhythmias. Cardiac electrical inhomogeneity may be the leading cause of the increased arrhythmic risk in patients with T2DM. The peak and the end of the T wave (Tp-e) interval and associated Tp-e/QT ratio are promising measures of ventricular repolarization indicating transmural dispersion of...

BACKGROUND AND PURPOSE We studied the relationship of heart rate-corrected QT interval with subclinical atherosclerosis, as determined by ultrasonographic measurement of carotid intima-media thickness (IMT) in nondiabetic subjects in the Insulin Resistance Atherosclerosis Study (IRAS). Prolonged heart rate-corrected QT interval is an unfavorable prognostic factor of cardiovascular morbidity and...

INTRODUCTION The arrhythmia potential has not been investigated adequately in psoriatic patients. In this study, we assessed the ventricular repolarization dispersion, using the Tp-e interval and the Tp-e/QT ratio, and investigated the association with inflammation. MATERIAL AND METHODS Seventy-one psoriasis vulgaris patients and 70 age- and gender-matched healthy individuals were enrolled in...

Background: QT dispersion (QTd) especially after ischemic heart disease and myocardial infarction is a prognostic predictor of mortality, in adult medicine.  Objective: This study was undertaken to determine the correlation between QT dispersion and neonatal stress. Neonates were divided into 3 groups: normal term (30 cases), normal preterm (30 cases) and sick neonates (36 cases), born between ...

OBJECTIVE To define the effects of beta(2) adrenergic receptor stimulation on ventricular repolarisation in vivo. DESIGN Prospective study. SETTING Tertiary referral centre. PATIENTS 85 patients with coronary artery disease and 22 normal controls. INTERVENTIONS Intravenous and intracoronary salbutamol (a beta(2) adrenergic receptor selective agonist; 10-30 microg/min and 1-10 microg/min...

Introduction: QT interval represents duration of ventricular electrical systole, i.e., the time required for completion of both ventricular depolarization and repolarization. QT interval duration normally varies between leads on the electrocardiography due to variation of repolarization and re-excitability of different ventricular regions. QT dispersion, defined as the difference between maximu...

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...

BACKGROUND Hypertension is an important risk factor for sudden cardiac death, of which the incidence increases with increases in blood pressure. Prolonged QT dispersion has been identified to indicate increased risk of life-threatening ventricular arrhythmia and sudden cardiac death. In this study, QT dispersion was investigated in hypertensive patients during the strain phase of the Valsalva m...