title: Radiofrequency catheter ablation for supraventricular tachycardia: a comparison study of children aged 0-4 and 5-9 years.
abstract: BACKGROUND
  The safety and effectiveness of radiofrequency catheter ablation (RFCA) for supraventricular tachycardia (SVT) in young children was investigated.
  
  
  METHODS
  Ninety-five children who underwent RFCA procedures were stratified according to age (group 1, 0-4 years, n = 24; group 2, 5-9 years, n = 71) and were evaluated retrospectively.
  
  
  RESULTS
  Among the 95 patients, atrioventricular reentrant tachycardia was 78.9%, atrioventricular nodal reentrant tachycardia was 10.5%, and ectopic atrial tachycardia was 8.4%. The acute success rate of RFCA was 97.9% and the recurrence rate was 11.6%. RFCA was performed for different main reasons in each group, including drug-resistant tachycardia (37.5% in group 1 vs 7% in group 2; P = 0.001) and symptomatic tachycardia (4.2% in group 1 vs 57.7% in group 2; P < 0.001). There was no significant difference in success rate, recurrence rate, and procedure and fluoroscopy duration between the two groups. The acute success rates did not differ significantly between patients with a single accessory pathway (AP) and those with multiple APs; however, failure or recurrence was more common in the patients with multiple APs (38.5% vs 11.5%; P = 0.01). The multiple APs were found frequently on the right side (P = 0.005). Septal dyskinesia with left ventricular dysfunction in Wolff-Parkinson-White syndrome and tachycardia-induced cardiomyopathy improved after RFCA.
  
  
  CONCLUSIONS
  RFCA was found to be effective and safe for SVT in young children.
authors.affiliation: Department of Pediatrics, Seoul National University Children's Hospital, Seoul, South Korea.
authors.forename: Hyo Soon
authors.initials: HS
authors.lastname: An
authors.forename: Eun Young
authors.initials: EY
authors.lastname: Choi
authors.forename: Bo Sang
authors.initials: BS
authors.lastname: Kwon
authors.forename: Gi Beom
authors.initials: GB
authors.lastname: Kim
authors.forename: Eun Jung
authors.initials: EJ
authors.lastname: Bae
authors.forename: Chung Il
authors.initials: CI
authors.lastname: Noh
authors.forename: Jung Yun
authors.initials: JY
authors.lastname: Choi
mesh_terms: D017677:Age Distribution; D000367:Age Factors; D017115:Catheter Ablation; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D011183:Postoperative Complications / Q000453:epidemiology*; D015995:Prevalence; D011859:Radiography; D012008:Recurrence; D012189:Retrospective Studies; D012307:Risk Factors; D013617:Tachycardia, Supraventricular / Q000000981:diagnostic imaging / Q000601:surgery*; D016896:Treatment Outcome
keywords: children; radiofrequency catheter ablation; supraventricular tachycardia