title: Follow-up of P dispersion after transcatheter closure of an atrial septal defect in children.
abstract: OBJECTIVE
  To determine in paediatric patients with atrial septal defects whether differences in P wave dispersion occurred with transcatheter closures using the Amplatzer septal occluder.
  
  
  METHODS
  A total of 31 children who had undergone transcatheter closures were evaluated. P maximum, P minimum, and P dispersion were measured with 12-lead surface electrocardiography, before the procedure and one week, one month, three months, six months and one year following the procedure. SPSS 10 was used for statistical analysis.
  
  
  RESULTS
  There were 23 (74.2%) females and 8 (25.8%) males with an overall mean age of 7.5 +/- 4.1 years and mean weight of 26.2 +/- 16.9 kg. The P maximum and P minimum measurements differed between patients during the follow-up period. Both measurements decreased with time. However, P dispersion was not significantly different throughout the follow-up period (before the procedure P maximum 95.4 +/- 15.6 ms, P minimum 64.5 +/- 15.4 ms, and P dispersion 30.8 +/- 11.4 ms; one year later, P maximum 76.1 +/- 14.6 ms, P minimum 47.1 +/- 12.1 ms, and P dispersion 29.1 +/- 9.1 ms).
  
  
  CONCLUSIONS
  Over time, there are no P dispersion differences in transcatheter closures using the Amplatzer septal occluder.
authors.forename: Osman
authors.initials: O
authors.lastname: Baspinar
authors.forename: Mehmet
authors.initials: M
authors.lastname: Kervancioglu
authors.forename: Senem
authors.initials: S
authors.lastname: Koruk
authors.forename: Metin
authors.initials: M
authors.lastname: Kilinc
authors.forename: Ahmet
authors.initials: A
authors.lastname: Irdem
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D022062:Electrophysiologic Techniques, Cardiac; D005260:Female; D006329:Heart Conduction System / Q000503:physiopathology*; D006344:Heart Septal Defects, Atrial / Q000503:physiopathology* / Q000628:therapy*; D006801:Humans; D008297:Male; D055989:Septal Occluder Device; D055815:Young Adult