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Chavez E.,Cardiocentro Ernesto Che Guevara | Gonzalez E.,University "Marta Abreu" of Las Villas | Castro J.,Institute Cardiologia y Cirugia Cardiovascular | Llanes M.C.,Hospital Pediatrico Jose Luis Miranda | And 4 more authors.
Revista Colombiana de Cardiologia | Year: 2011

Introduction: Left ventricular hypertrophy associated with worse cardiovascular prognosis increases the risk of morbidity and mortality when associated with paroxysms of atrial fibrillation. This arrhythmia can be predicted by measuring the maximum and minimum P wave duration in the electrocardiogram, and by calculating its dispersion. Objective: to determine the electrocardiographic changes in P wave duration according to modifications in blood pressure and echocardiographic measurements in children between 8-11 years old. METHODS: we studied 90 children who underwent 12- lead surface electrocardiogram, echocardiogram and blood pressure measurements. We measured the values of maximum P, minimum P and 12-lead electrocardiogram, and calculated the P wave dispersion as the difference between its maximum and minimum duration. Results: there were no significant differences by sex for the results of average P-wave dispersion The correlation coefficient (r) for systolic blood pressure was r = 0.159 with a significance of p = 0.03. A multivariate analysis showed a significant correlation between P wave dispersion and the velocity of the mitral inflow A wave(r = 0.227 and p = 0.01). Conclusions: there is a dependency between the dispersion of the P wave in the electrocardiogram and variables such as systolic blood pressure and A wave velocity of mitral inflow, fact that has been linked to risk of atrial fibrillation in adults. Source


Chavez E.,Cardiocentro Ernesto Che Guevara | Gonzalez E.,University "Marta Abreu" of Las Villas | Castro J.,Institute Cardiologia y Cirugia Cardiovascular | del Llanes M.C.,Hospital Pediatrico Jose Luis Miranda | And 4 more authors.
Revista Colombiana de Cardiologia | Year: 2011

INTRODUCTION: the relationship between diastolic dysfunction and P wave dispersion in the electrocardiogram is being studied since some years ago, and in this regard echocardiography is emerging as a tool to improve risk stratification in mild hypertension. OBJECTIVE: to determine the dependence of the dispersion of the P wave of electrocardiogram with echocardiographic variables in a pediatric population. METHODS: we studied 400 children from a total of 450 belonging to three elementary schools, and excluded those whose parents did not want them to participate in the study and those who had known congenital diseases. We performed 12-lead surface ECG and 4 blood pressure takings. We mea sured maximum and minimum P values and calculated P wave dispersion in the electrocardiogram. Echocardiography for structural measurements and pulsed Doppler of mitral flow were also performed. RESULTS: mean values for duration of A wave of mitral flow showed no significant differences; however, there is a correlation coefficient (r) and significant p between P wave dispersion an d duration of mitral flow A wave for normotensive (r = - 0.117 p = 0.05), NT (r = - 0.309 p = 0.001) and hypertensive (r = - 0.586 p = 0.001). There are significant differences between the mean P wave dispersion between diagnostic groups. CONCLUSIONS: we highlight the dependence of P wave dispersion, the electrocardiogram and the duration of the mitral inflow A wave, events that are related to risk of atrial fibrillation in adults, so perhaps this result gives an approach to earlier risk predictions in pediatric patients. Source

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