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Changes in Repolarization Dynamicity and the Assessment of the Arrhythmic Risk
Author(s) -
MAISONBLANCHE PIERRE,
COUMEL PHILIPPE
Publication year - 1997
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.1997.tb06111.x
Subject(s) - medicine , torsades de pointes , cardiology , qt interval , repolarization , short qt syndrome , beat (acoustics) , long qt syndrome , electrophysiology , physics , acoustics
At the present time, the assessment of the arrhythmic risk from surface ECG recordings is built on time‐domain and frequenct‐domain analysis of high resolution ECG acquisition together with in‐terlead variability of QT interval duration (QT dispersion). The corresponding raw ECG tracings are obtained in resting conditions. However, the dynamic aspects of the EGG signal is a rapidly evolving matter of interest. In addition to the beat‐to‐beat oscillations of the ventricular repolarization amplitude (QT ai‐ternans), there is growing evidence that the patterns of QT interval shortening with increasing heart rate are linked to suceptibility to ventricular arhythmias. In this report, we will mailnly address the association between QT dynamicity and the risk of developing torsades de pointes.