Key result
QT dispersion represents ventricular repolarization heterogeneity and predicts ventricular arrhythmias, but overlapping values in normal and pathological states hinder its clinical applicability.
Why the study?
Does QT dispersion predict sudden death and ventricular arrhythmias in patients with chronic heart failure and other cardiac diseases?
Does QT dispersion predict sudden death and ventricular arrhythmias in patients with chronic heart failure and other cardiac diseases?
QT dispersion is highlighted as a clinically useful, though often forgotten, parameter for predicting sudden death and ventricular arrhythmias in heart failure and other cardiac diseases.
QT dispersion may aid arrhythmia risk assessment in HF; leaves open routine adoption pending prospective validation.
Clinical and experimental electrophysiological studies have shown the importance of inhomogeneous myocardial repolarization in ventricular arrhythmias' genesis. Increased dispersion of repolarisation provides a substrate for ventricular arrhythmias by generating functional unidirectional block areas, thereby predisposing to reentry. QT dispersion, defined as the difference between the longest and the shortest QT interval on the surface ECG, is a validated measure of repolarisation dispersion. QT dispersion predicts sudden death and ventricular arrhythmias in patients with chronic heart failure from coronary heart disease and various cardiac diseases
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Suwanto et al. (2021) conducted a review in Cardiac diseases and arrhythmias. QT dispersion was evaluated. QT dispersion represents ventricular repolarization heterogeneity and predicts ventricular arrhythmias, but overlapping values in normal and pathological states hinder its clinical applicability.
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