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Measurement of heart stability


Authors: P. Heinc
Authors‘ workplace: I. interní klinika LF UP a FN Olomouc
Published in: Kardiol Rev Int Med 2006, 8(4): 156-165
Category: Editorial

Overview

Assessment of ventricular repolarisation on the surface ECG and electrophysiologic testing represent a good tool for arrhythmia and sudden cardiac death risk stratification in a variety of clinical conditions. The occurrence of an abrupt ventricular arrhythmia is a multifactorial and time-dependent process. Each of the currently measured risk factors identifies probably only a small fraction of the multifactorial risk process. That’s why in a large-scale of prospective clinical studies in patients with different underlying pathologies, none of the known risk factors alone was able to select high-risk groups with sufficient sensitivity and positive predictive accuracy. Methods of measurement and clinical signification of Holter ECG monitoring, late potentials, heart rate variability, heart rate turbulence, baroreflex sensitivity, T-wave alternans, QT interval, QT variability, QT dispersion and electrophysiologic testing are described.

Keywords:
late potentials – heart rate variability – heart rate turbulence – baroreflex sensitivity – T-wave alternans – QT interval – QT variability – QT dispersion – electrophysiologic testing


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