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. 2013 Sep 30;44(3):178-83.
eCollection 2013 Jul.

Dependence of P-wave dispersion on mean arterial pressure as an independent hemodynamic variable in school children

Elibet Chávez  1 , Emilio F González  2 , María Del Carmen Llanes  3 , Merlin Garí Llanes  3 , Yosvany García  3
Affiliations

Dependence of P-wave dispersion on mean arterial pressure as an independent hemodynamic variable in school children

Elibet Chávez et al. Colomb Med (Cali). .

Abstract
in English, Spanish

Introduction: The relationship between diastolic dysfunction and P-wave dispersion (PWD) in the electrocardiogram has been studied for some time. In this regard, echocardiography is emerging as a diagnostic tool to improve risk stratification for mild hypertension.

Objective: To determine the dependence of PWD on the electrocardiogram and on echocardiographic variables in a pediatric population.

Methods: 515 children from three elementary schools were studied from a total of 565 children. Those whose parents did not want them to take part in the study, as well as those with known congenital diseases, were excluded. Tests including 12-lead surface ECGs and 4 blood pressure (BP) measurements were performed. Maximum and minimum P-values were measured, and the PWD on the electrocardiogram was calculated. Echocardiography for structural measurements and the pulsed Doppler of mitral flow were also performed.

Results: A significant correlation in statistical variables was found between PWD and mean BP for pre-hypertensive and hypertensive children, i.e., r = 0.32, p <0.01 and r = 0.33, p <0.01, respectively. There was a significant correlation found between PWD and the left atrial area (r = 0.45 and p <0.01).

Conclusions: We highlight the dependency between PWD, the electrocardiogram and mean blood pressure. We also draw attention to the dependence of PWD on the duration of the mitral inflow A-wave. This result provides an explanation for earlier changes in atrial electrophysiological and hemodynamic characteristics in pediatric patients.

Introducción: La relación entre la disfunción diastólica y la dispersión de la onda P (PWD) en el electrocardiograma se ha estudiado durante algún tiempo. En este sentido, la ecocardiografía se está convirtiendo en una herramienta de diagnóstico para mejorar la estratificación de riesgo en la hipertensión leve.

Objetivo: Determinar la dependencia de las PCD en el electrocardiograma de las variables ecocardiográficas en una población pediátrica.

Métodos: 515 niños de tres escuelas primarias fueron estudiados, de un total de 565 niños. Aquellos cuyos padres no quieren que participen en el estudio, así como aquellos con enfermedades congénitas conocidas, fueron los ECG de superficie excluded.12 derivaciones y 4 de presión arterial (PA) se realizó mediciones. Máxima y P-valores mínimos fueron medidos y la discapacidad en el electrocardiograma se calculó. También se realizaron ecocardiografía para medidas estructurales y Doppler pulsado del flujo mitral.

Resultados: Se encontró una correlación significativa en variables estadísticas entre personas con discapacidad y la media de BP para niños prehipertensos e hipertensos r = 0,32, p <0,01 yr = 0,33, p <0,01, respectivamente. Existe una correlación significativa entre PWD y área de la aurícula izquierda (r = 0,45 y p <0,01).

Conclusiones: Se destaca la dependencia de las PCD, el electrocardiograma y la media de la presión arterial. También llamamos la atención a la dependencia de personas con discapacidad en la duración de la entrada de la onda A mitral, así que quizás este resultado proporciona una explicación de los cambios anteriores en las características de electrofisiología auricular y hemodinámicas en pacientes pediátricos.

Keywords: P-wave dispersion; blood hypertension; mitral A-wave duration; prehypertension.

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Conflict of interest statement

Conflict of interest: none declared

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