SciELO - Scientific Electronic Library Online

vol.20 issue3Limitations of Medical Sciences professors in Sancti Spirítus in the development of educational researchProposal of indicators for the evaluation of the university extension process author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




  • Have no cited articlesCited by SciELO

Related links

  • Have no similar articlesSimilars in SciELO


Gaceta Médica Espirituana

On-line version ISSN 1608-8921


RODRIGUEZ JIMENEZ, Ailed Elena et al. Dispersion of the corrected QT interval as a predictor of ventricular arrhythmias in acute myocardial infarction. Gac Méd Espirit [online]. 2018, vol.20, n.3, pp.78-91. ISSN 1608-8921.


Dispersion of the QT interval is an electrocardiographic marker that can be useful in the stratification of arrhythmic risk in patients with acute myocardial infarction.


To describe the influence of corrected QT interval dispersion in association with other risk factors as predictors of ventricular arrhythmias in acute myocardial infarction with ST-segment elevation.


209 patients who entered consecutively with diagnosis of acute myocardial infarction with elevation of the ST segment from January 2013 to June 2014 at Camilo Cienfuegos General Provincial Hospital of Sancti Spíritus were studied prospectively. Clinical, electrocardiographic and echocardiographic laboratory data were collected; the prognostic implication of the corrected QT interval dispersion in the appearance of ventricular arrhythmias through binary logistic regression and operator-receiver curves was determined.


Ventricular arrhythmias occurred in 39 (18.7%) patients. The dispersion of the corrected QT showed an adequate discrimination capacity in the prediction of any serious ventricular arrhythmic episode (c = 0.768, p = 0.0001). In the multivariate analysis, QT dispersion was an independent predictor of ventricular arrhythmias (OR = 7.075, 95% CI = 1.6-32.9, p = 0.009).


The probability of presenting ventricular arrhythmias during acute myocardial infarction is greater when the dispersion of the QT interval is increased, so it is suggested that it should be a variable to be evaluated in the prognostic stratification of acute myocardial infarction.

Keywords : Long QT syndrome; tachycardia ventricular; arrhythmias cardiac; ventricular fibrillation; myocardial infarction; QT interval dispersion; prognostic stratification.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )