title: Catheter ablation of idiopathic ventricular tachycardia in children using the EnSite NavX system with/without fluoroscopy.
abstract: OBJECTIVE
  Curative therapy of idiopathic ventricular tachycardia remains a challenge in interventional electrophysiology. The aim of this study was to demonstrate the utility of an EnSite NavX system in the catheter ablation of idiopathic ventricular tachycardia in children.
  
  
  METHODS
  In all, 17 children with idiopathic ventricular tachycardia underwent electrophysiological studies using the EnSite NavX system guidance.
  
  
  RESULTS
  The mean patient age was 13 ± 2.4 years (range: 7.8-17.9) and the mean patient weight was 52.3 ± 11.9 kg (range: 32-75). The origin of ventricular tachycardia was in the right ventricular outflow tract in nine patients, in the left ventricle in six, near the bundle of His/right bundle branch in one, and in the left aortic cusp in one. The mean procedure and fluoroscopy times were 169.3 ± 43.2 minutes and 8 ± 10.8 minutes, respectively. No fluoroscopy was used in six patients. The mean radiation exposure was 33.1 ± 56.4 mGy. Acute success was achieved in 14 patients (82%). The focus of ventricular tachycardia was epicardial in two failed procedures. During a mean follow-up of 8.5 ± 7.6 months, ventricular tachycardia recurred in three patients, two of whom underwent a second procedure. Except for one patient who developed transient right bundle branch block, no complications were seen.
  
  
  CONCLUSIONS
  Catheter ablation of idiopathic ventricular tachycardia in children can be performed safely and effectively with low fluoroscopy exposure using the EnSite NavX system.
authors.affiliation: Department of Pediatric Cardiology,Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital,Istanbul,Turkey.
authors.forename: Isa
authors.initials: I
authors.lastname: Ozyilmaz
authors.affiliation: Department of Pediatric Cardiology,Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital,Istanbul,Turkey.
authors.forename: Yakup
authors.initials: Y
authors.lastname: Ergul
authors.affiliation: Department of Pediatric Cardiology,Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital,Istanbul,Turkey.
authors.forename: Celal
authors.initials: C
authors.lastname: Akdeniz
authors.affiliation: Department of Pediatric Cardiology,Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital,Istanbul,Turkey.
authors.forename: Erkut
authors.initials: E
authors.lastname: Ozturk
authors.affiliation: Department of Pediatric Cardiology,Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital,Istanbul,Turkey.
authors.forename: Ibrahim C
authors.initials: IC
authors.lastname: Tanidir
authors.affiliation: Department of Pediatric Cardiology,Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Training and Research Hospital,Istanbul,Turkey.
authors.forename: Volkan
authors.initials: V
authors.lastname: Tuzcu
mesh_terms: D000293:Adolescent; D018780:Body Surface Potential Mapping / Q000379:methods*; D017115:Catheter Ablation / Q000295:instrumentation*; D002648:Child; D004562:Electrocardiography; D015716:Electrocardiography, Ambulatory; D004867:Equipment Design; D005260:Female; D005471:Fluoroscopy / Q000379:methods*; D005500:Follow-Up Studies; D006329:Heart Conduction System / Q000503:physiopathology* / Q000601:surgery; D006801:Humans; D008297:Male; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted / Q000295:instrumentation*; D017180:Tachycardia, Ventricular / Q000175:diagnosis / Q000503:physiopathology / Q000601:surgery*; D016896:Treatment Outcome