title: [P wave dispersion increased in childhood depending on blood pressure, weight, height, and cardiac structure and function].
abstract: BACKGROUND
  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.
  
  
  METHODS
  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±5.96g/m(2.7)) and hypertensive (30.34±8.48g/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.
authors.affiliation: Departamento de Electrofisiología y Estimulación Cardiaca, Cardiocentro Ernesto Che Guevara, Facultad de Medicina, Universidad Médica Dr. Serafín Ruiz de Zárate Ruiz, Santa Clara, Villa Clara, Cuba. Electronic address: elibet@capiro.vcl.sld.cu.
authors.forename: Elibet
authors.initials: E
authors.lastname: Chávez-González
authors.affiliation: Centro de Desarrollo Electrónico, Facultad de Ingeniería Eléctrica, Universidad Central Marta Abreu de las Villas, Santa Clara, Villa Clara, Cuba.
authors.forename: Emilio
authors.initials: E
authors.lastname: González-Rodríguez
authors.affiliation: Servicio de Cardiopediatría, Hospital Pediátrico José Luis Miranda, Facultad de Medicina, Universidad Médica Dr. Serafín Ruiz de Zárate Ruiz, Santa Clara, Villa Clara, Cuba.
authors.forename: María Del Carmen
authors.initials: Mdel C
authors.lastname: Llanes-Camacho
authors.affiliation: Servicio de Cardiopediatría, Hospital Pediátrico José Luis Miranda, Facultad de Medicina, Universidad Médica Dr. Serafín Ruiz de Zárate Ruiz, Santa Clara, Villa Clara, Cuba.
authors.forename: Merlin
authors.initials: M
authors.lastname: Garí-Llanes
authors.affiliation: Servicio de Cardiopediatría, Hospital Pediátrico José Luis Miranda, Facultad de Medicina, Universidad Médica Dr. Serafín Ruiz de Zárate Ruiz, Santa Clara, Villa Clara, Cuba.
authors.forename: Yosvany
authors.initials: Y
authors.lastname: García-Nóbrega
authors.affiliation: Servicio de Endocrinología, Hospital Pediátrico José Luis Miranda, Facultad de Medicina, Universidad Médica Dr. Serafín Ruiz de Zárate Ruiz, Santa Clara, Villa Clara, Cuba.
authors.forename: Julieta
authors.initials: J
authors.lastname: García-Sáez
mesh_terms: D001794:Blood Pressure; D001827:Body Height; D001835:Body Weight; D002648:Child; D003430:Cross-Sectional Studies; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006321:Heart / Q000502:physiology*; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D008297:Male
keywords: Cuba; Dispersión de la onda P; Left ventricular mass index; P wave dispersion; Prevención; Prevention; Índice de masa ventricular izquierda