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Cryoablation of accessory pathways in children
1Arkansas Children's Hospital, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72202, USA. tuzcuvolkan@uams.edu
Pacing and Clinical Electrophysiology : PACE
|August 30, 2007
Summary
Cryoablation is a safe and effective treatment for pediatric accessory pathways (APs), achieving high acute success rates. While recurrence is higher than radiofrequency ablation, it shows promise as a primary option for children.
Area of Science:
- Pediatric Cardiology
- Electrophysiology
- Minimally Invasive Cardiac Procedures
Background:
- Cryoablation is favored for septal tachycardia due to safety.
- Concerns exist regarding coronary artery stenosis with radiofrequency ablation (RFA) in children.
- Cryoablation may be advantageous for nonseptal accessory pathways (APs).
Purpose of the Study:
- To evaluate the efficacy and safety of cryoablation for accessory pathways (APs) in pediatric patients.
- To compare cryoablation outcomes with existing RFA data in children.
- To assess the impact of institutional experience on cryoablation success rates.
Main Methods:
- Retrospective analysis of 39 pediatric patients undergoing cryoablation for APs.
- Utilized a 3D, surface electrode-based navigation system to minimize fluoroscopy.
- Categorized APs into septal (n=23) and nonseptal (n=22).
Main Results:
- Overall acute success rate for cryoablation was 73%, reaching 84% with supplemental RFA.
- Institutional experience significantly improved acute success rates from 57% to 91%.
- Recurrence rate was 24% during a median follow-up of 282 days.
Conclusions:
- Cryoablation is a safe procedure with high acute success in pediatric AP ablation.
- It presents a potential first-line ablation strategy for all APs in children.
- Higher recurrence rates necessitate further investigation and comparison with RFA.
