RT-175
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Dispersion of QT interval in
ectopic ventricular beats. A new approach to assessment of ventricular inhomogeneity
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Andrzej Dabrowski, Ryszard
Piotrowicz, Elzbieta Kramarz.
Department of Noninvasive Cardiology, Central Clinical Hospital MMA, Warsaw,
Poland
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Introduction
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Many clinical studies demonstrated the relationship
between prolonged dispersion of QT interval and increased risk for malignant ventricular
arrhythmias1-4. In all studies the dispersion of QT
interval was measured only in sinus beats, and, to our knowledge, there is no information
on the magnitude and clinical significance of QT interval dispersion measured in ectopic
ventricular beats (QTdV).
The present study was therefore designed to measure QTdV from the surface
electrocardiogram (ECG) of patients with ectopic ventricular beats (EVBs) due to a variety
of aetiologies, and to analyse the relation between the magnitude of QTdV and varied
clinical as well as electrocardiographic parameters.
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