Electrocardiographic T Wave and its Relation With Ventricular Repolarization Along Major Anatomical Axes

The Electrocardiographic T-Wave and its Relation with Ventricular Repolarization along Major Anatomical Axes

Electrocardiographic T wave and its relation with ventricular repolarization along major anatomical axes.

BACKGROUND The genesis of the electrocardiographic T wave is incompletely understood and subject to controversy. We have correlated the ventricular repolarization sequence with simultaneously recorded T waves. METHODS AND RESULTS Nine pig hearts were Langendorff-perfused (atrial pacing, cycle length 650 ms). Local activation and repolarization times were derived from unipolar electrograms sam...

Electrocardiographic quantitation of ventricular repolarization.

Quantification of the electrocardiographic ventricular repolarization involving the T-U wave complex is usually performed with reference to the axis of the T wave and the QT interval duration. A novel quantitative approach to improve the description of ventricular repolarization was applied to the digitized electrocardiograms of 423 normal subjects. Six electrocardiographic repolarization chara...

Electrocardiographic Parameters of Ventricular Repolarization – Modifiers and the Prognostic Value

Normal electric activity of the heart consists of repeated cardiomyocyte depolarizations and repolarizations. Repolarization of the ventricular action potential is dependent on both inward and outward ion fluxes across cell membranes. Repolarization abnormalities may predispose to ventricular arrhythmias, and several factors may modify repolarization-related arrhythmia vulnerability. Ventricula...

Electrocardiographic identification of abnormal ventricular depolarization and repolarization in patients with idiopathic ventricular fibrillation.

OBJECTIVES We sought to gain more insight into the arrhythmogenic etiology of idiopathic ventricular fibrillation (VF) by assessing ventricular depolarization and repolarization properties by means of various electrocardiographic (ECG) techniques. BACKGROUND Idiopathic VF occurs in the absence of demonstrable structural heart disease. Abnormalities in ventricular depolarization or repolarizat...