Predictive Value of QT Dispersion for Ventricular Tachyarrhythmias in Patients with Implantable Cardioverter Defibrillator

Background: QT dispersion, measured as interlead variability of QT intervals in the surface electrocardiogram, has been demonstrated to provide an indirect measurement of the inhomogeneity of myocardial repolarization as a potential substrate for ventricular arrhythmias.

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