Arrhythmias & electrophysiology
Effect of Ablation Energy Source on Outcomes of Slow Pathway Modification for AVNRT in Children
Authors' conclusion
In this largest pediatric study of AVNRT ablation, RF and Cryo demonstrated comparable high acute success and rare documentation of AV block that did not result in temporary or permanent pacing.
Study context
- Population
- Patients aged 1 to 21 years undergoing elective first-time slow pathway modification for AVNRT, April 2016 to March 2019; excluding congenital heart disease and >1 ablation targetmean age 13.6 ± 3.4 years
- Participants
- 2,448 patients
- Exposure
- RF vs cryoablation (Cryo) for slow pathway modification
- RF onlyn = 1,046
- Cryo onlyn = 1,201
- RF→Cryon = 135
- Cryo→RFn = 66
- Outcome
- Acute ablation failure
Methodological detailsregistry-based (NCDR IMPACT Registry)
- Registry-based (NCDR IMPACT Registry)
Main finding
As reported in the abstract
- Overall acute ablation failure 1.3% (n = 33); no difference by energy source
- P = 0.5
Observational data: associations, not effects.
Safety
Atrioventricular (AV) block requiring permanent pacemaker
- Did not occur in any group
Transient AV block
- Occurred in 0.4% of the cohort, no difference by group
Original publication
Effect of Ablation Energy Source on Outcomes of Slow Pathway Modification for AVNRT in Children. JACC Clin Electrophysiol. Published 24 July 2024. doi:10.
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