Dispersion of Repolarization: Time to Move Beyond QT Dispersion

Background: Over the last few years, the concept of dispersion of repolarization, evaluated as interlead variability of QT interval duration in surface ECG, emerged as a possible tool to identify patients at high‐risk for cardiac arrhythmias. Despite substantial progress in understanding of the electrophysiological basis for dispersion of repolarization, the question remains whether interlead differences in ECG‐ recorded T‐wave duration and morphology (QT dispersion) indicate heterogeneity in ventricular recovery time and pattern.

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