Resumo

ARINI, Pedro D.  e  LACIAR, Eric. Quantification of Cardiac Ventricular Repolarization and its Spatial Dispersion through the Surface Electrocardiogram. Rev. argent. cardiol. [online]. 2009, vol.77, n.1, pp.47-55. ISSN 1850-3748.

The ventricular repolarization dispersion (VRD) is determined basically by the heterogeneity of the action potentials in different myocardial regions. Usually the heart responds to certain physiopathological states by producing a VRD increase, which may lead to a malignant ventricular arrhythmia and/or sudden death. For 25 years, the VRD has been quantified with several indexes obtained by computerprocessing the electrocardiogram, in order to identify cardiac- risk patients. These indexes are based on the detection of T wave changes in duration or form, in the presence of cardiopathies. A revision of the spatial dispersion indexes and their potential as supporting tool for the diagnosis of cardiac risk is presented in this work.

Palavras-chave : T-wave Morphology; QT Interval Dispersion; ECG Decomposition; Risk Factors; Ventricular Repolarization; Dispersion; Sudden Death.

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