OBJECTIVE To investigate the role of the autonomic nervous system in determining QT interval and dispersion. PATIENTS AND METHODS 32 patients with chronic primary (idiopathic) autonomic failure (19 men, mean age 60 years) and 21 normal controls (11 men, mean age 59) without symptoms of ischaemic heart disease were studied retrospectively. Autonomic failure was diagnosed by a combination of sy...

QT dispersion (QTD) on 12-lead ECGs has been proposed as a marker of malignant ventricular tachyarrhythmias, and increased QTD has been reported in long QT syndrome (LQTS). On the other hand, it has been demonstrated that transmural dispersion is associated with ventricular tachyarrhythmias in an experimental model. However, the precise type of QTD or transmural dispersion that contributes most...

OBJECTIVES Carbon monoxide (CO) poisoning leads to cardiac dysrhythmia. Increased heterogeneity in ventricular repolarisation on electrocardiogram (ECG) shows an increased risk of arrhythmia. A number of parameters are used to evaluate ventricular repolarisation heterogeneity on ECG. The aim of our study is to investigate the effect of acute CO poisoning on indirect parameters of ventricular re...

Background and objectives: The importance of minimizing the exaggerated sympatho-adrenergic responses and QT interval and QT interval dispersion changes that may develop due to laryngoscopy and tracheal intubation during anesthesia induction in the hypertensive patients is clear. Esmolol decreases the hemodynamic response to laryngoscopy and intubation. However, the effect of esmolol in decreas...

BACKGROUND Cardiac arrhythmias can be a part of cardiovascular involvement in some rheumatic diseases, but data about familial Mediterranean fever (FMF) are conflicting. AIM To search for abnormalities in ventricular repolarization indices in FMF patients. PATIENTS AND METHODS Seventy seven FMF patients and 30 age/gender comparable healthy controls were included. All patients were attack fr...

BACKGROUND/AIMS QT dispersion is a sign of heterogeneity of ventricular myocardial wall and is associated with cardiac mortality and morbidity. Data regarding with the persistence of QT interval changes in cases with acute pancreatitis (AP) that required clinical follow-up, are insufficient. Therefore, in this study, we aimed to evaluate the QT interval changes during attack and after remission...

Objectives: Accelerated Idioventricular Rhythm (AIVR) is a distinct subgroup of idiopathic ventricular tachycardia (VT) with characteristic clinical and electrophysiologic properties that have not been studied extensively in children. This study was designed to assess the efficacy of adenosine and verapamil in children with this rhythm disorder and to determine the effects of verapamil on QT di...

BACKGROUND Chronic renal failure and hemodialysis affect many ECG parameters which can affect cardiac repolarization. OBJECTIVE To investigate the change in ventricular repolarization before and after kidney transplantation in children. METHODS A total of 45 children with end-stage renal disease, 45 children at least 6 months after successful renal transplantation, and 45 normal age-matched...

Spatial dispersion of repolarization in the form of transmural, trans-septal and apico-basal dispersion of repolarization creates voltage gradients that inscribe the J wave and T wave of the ECG. Amplification of this spatial dispersion of repolarization (SDR) underlies the development of life-threatening ventricular arrhythmias associated with inherited or acquired ion channelopathies giving r...