Dispersion of the QT intervals: a predictor of malignat ventricular arrhytmias

Authors

  • Roberto Zayas Molina
  • Rosa E. Díaz Garriga
  • Margarita Dorantes Sánchez

Keywords:

LONG QT SYNDROME/complications, PACEMAKER, ARTIFICIAL/utilization, ELECTROCARDIOGRAPHY/methods, DEATH, SUDDEN, CARDIAC.

Abstract

The QT interval is a marker of ventricular repolarization. The increase of heterogeneity in the repolarization of the ventricles is associated with a higher risk for the appareance of malignant ventricular arrhytmias and it may be expressed by the dispersion of the QT interval. In practice, the dispersion of this interval may be defined as the difference between the maximum and the minimum QT in a standard EKG of 12 derivations, eventhough there are diverse methods to measure it. Areview of some fundamental aspects connected with the QT dispersion, its clinical expression, the cellular bases and the limitations of the method that may be useful to evaluate this important sign is made.

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Author Biographies

Roberto Zayas Molina

Especialista de II Grado en Cardiología.

Rosa E. Díaz Garriga

Especialista de I Grado en Cardiología.

Margarita Dorantes Sánchez

Investigador Titular.

Published

2014-03-27

How to Cite

1.
Zayas Molina R, Díaz Garriga RE, Dorantes Sánchez M. Dispersion of the QT intervals: a predictor of malignat ventricular arrhytmias. Rev. cuba. cardiol. cir. cardiovasc. [Internet]. 2014 Mar. 27 [cited 2025 Dec. 6];14(2). Available from: https://revcardiologia.sld.cu/index.php/revcardiologia/article/view/496

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Section

Original Articles