title: Successful ablation of incessant idiopathic right ventricular tachycardia arising from unusual sites in children.
abstract: OBJECTIVE
  Most idiopathic right ventricular tachycardias originate from the outflow tract. We present a case series of idiopathic incessant ventricular tachycardia arising from unusual sites of the right ventricle in children, which were well resolved by catheter ablation.
  
  
  METHODS
  A retrospective review was performed of all three patients who underwent ablation of idiopathic ventricular tachycardia below the level of the right ventricular outflow tract using three-dimensional mapping in our institute. Result All three patients presented with tachycardia-induced cardiomyopathy due to incessant ventricular tachycardia on first admission. The sites of successful ablation were at the proximal right bundle branch, distal right bundle branch, and apex of the right ventricle, respectively. No complications occurred, and there has been no recurrence of ventricular tachycardia after the final ablation at an average follow-up period of 9 months. All three patients have achieved normalisation of left ventricular size and systolic function.
  
  
  CONCLUSIONS
  Incessant idiopathic ventricular tachycardia originating from unusual sites of the right ventricle in children, resulting in significant symptoms and impaired ventricular function, can be successfully treated with catheter ablation.
authors.affiliation: 1Cardiovascular Center,Children's Hospital of Fudan University,Shanghai 201102,PR China.
authors.forename: Lin
authors.initials: L
authors.lastname: Wu
authors.affiliation: 1Cardiovascular Center,Children's Hospital of Fudan University,Shanghai 201102,PR China.
authors.forename: Hong
authors.initials: H
authors.lastname: Tian
authors.affiliation: 1Cardiovascular Center,Children's Hospital of Fudan University,Shanghai 201102,PR China.
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.affiliation: 1Cardiovascular Center,Children's Hospital of Fudan University,Shanghai 201102,PR China.
authors.forename: Xuecun
authors.initials: X
authors.lastname: Liang
authors.affiliation: 2Cardiology Department,Shanghai First People's Hospital Affiliated to Jiaotong University,Shanghai 200082,PR China.
authors.forename: Gang
authors.initials: G
authors.lastname: Chen
mesh_terms: D017115:Catheter Ablation; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D012074:Remission Induction; D012189:Retrospective Studies; D017180:Tachycardia, Ventricular / Q000601:surgery*
keywords: Catheter ablation; idiopathic ventricular arrhythmia; paediatric; right ventricle; tachycardia-induced cardiomyopathy