Abstract

CHAVEZ-GONZALEZ, Elibet et al. P wave dispersion increased in childhood depending on blood pressure, weight, height, and cardiac structure and function. Arch. Cardiol. Méx. [online]. 2014, vol.84, n.3, pp.162-170. ISSN 1665-1731.  https://doi.org/10.1016/j.acmx.2013.09.004.

Introduction: Increased P wave dispersion are identified as a predictor of atrial fibrillation. There are associations between hypertension, P wave dispersion, constitutional and echocardiographic variables. These relationships have been scarcely studied in pediatrics. Objective: The aim of this study was to determine the relationship between P wave dispersion, blood pressure, echocardiographic and constitutional variables, and determine the most influential variables on P wave dispersion increases in pediatrics. Method: In the frame of the PROCDEC II project, children from 8 to 11 years old, without known heart conditions were studied. Arterial blood pressure was measured in all the children; a 12-lead surface electrocardiogram and an echocardiogram were done as well. Results: Left ventricular mass index mean values for normotensive (25.91 ± 5.96 g/m^2.7) and hypertensive (30.34 ± 8.48 g/m^2.7) showed significant differences P = .000. When we add prehypertensive and hypertensive there are 50.38% with normal left ventricular mass index and P wave dispersion was increased versus 13.36% of normotensive. Multiple regression demonstrated that the mean blood pressure, duration of A wave of mitral inflow, weight and height have a value of r = 0.88 as related to P wave dispersion. Conclusions: P wave dispersion is increased in pre- and hypertensive children compared to normotensive. There are pre- and hypertensive patients with normal left ventricular mass index and increased P wave dispersion. Mean arterial pressure, duration of the A wave of mitral inflow, weight and height are the variables with the highest influence on increased P wave dispersion.

Keywords : Left ventricular mass index; P wave dispersion; Prevention; Cuba.

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