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Cryoablation with an 8‐mm Tip Catheter for Pediatric Atrioventricular Nodal Reentrant Tachycardia Is Safe and Efficacious with a Low Incidence of Recurrence
Author(s) -
SILVER ERIC S.,
SILVA JENNIFER N. A.,
CERESNAK SCOTT R.,
CHIESA NANCY A.,
RHEE EDWARD K.,
DUBIN ANNE M.,
AVASARALA KISHOR,
VAN HARE GEORGE F.,
COLLINS KATHRYN K.
Publication year - 2010
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1111/j.1540-8159.2010.02706.x
Subject(s) - medicine , cryoablation , cryotherapy , ablation , atrioventricular block , tachycardia , cryosurgery , catheter , catheter ablation , surgery , radiofrequency ablation , incidence (geometry) , cardiology , physics , optics
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)