Cryoablation with an 8-mm tip catheter for pediatric atrioventricular nodal reentrant tachycardia is safe and efficacious with a low incidence of recurrence

Eric S. Silver, Jennifer N.A. Silva, Scott R. Ceresnak, Nancy A. Chiesa, Edward K. Rhee, Anne M. Dubin, Kishor Avasarala, George F. Van Hare, Kathryn K. Collins

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Background: Cryoablation with 4- and 6-mm tip ablation catheters has been demonstrated to be safe and effective in the treatment of atrioventricular nodal reentrant tachycardia (AVNRT) in pediatric patients, albeit with a higher rate of clinical recurrence. Limited information is available regarding efficacy, mid-term outcomes, and complications related to the use of the 8-mm Freezor Max Cryoablation catheter (Medtronic, Minneapolis, MN, USA) in pediatric patients. Methods: We performed a retrospective review of all pediatric patients with normal cardiac anatomy who underwent an ablation procedure for treatment of AVNRT using the 8-mm tip Cryoablation catheter at three large pediatric academic arrhythmia centers. Results: Cryoablation with an 8-mm tip catheter was performed in 77 patients for treatment of AVNRT (female n = 40 52%, age 14.8 ± 2.2 years, weight 62.0 ± 13.9 kg). Initial procedural success was achieved in 69 patients (69/76, 91%). Transient second- or third-degree atrioventricular (AV) block was noted in five patients (6.5%). There was no permanent AV block. Of the patients successfully ablated with Cryotherapy, there were two recurrences (2/70, 2.8%) over a follow-up of 11.6 ± 3.3 months. Conclusion: Cryoablation with an 8-mm tip ablation catheter is both safe and effective with a low risk of recurrence for the treatment of AVNRT in pediatric patients. (PACE 2010; 33:681-686).

Original languageEnglish
Pages (from-to)681-686
Number of pages6
JournalPACE - Pacing and Clinical Electrophysiology
Volume33
Issue number6
DOIs
StatePublished - Jun 2010

Keywords

  • 8-mm cryoablation
  • AVNRT
  • Pediatrics
  • SVT

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