February 4, 2023Journal of Cardiovascular Electrophysiology
Catheter ablation of atrioventricular nodal reentrant tachycardia with an irrigated contact‐force sensing radiofrequency ablation catheter
Key result
Irrigated contact-force sensing RFA is linked to ~11% shorter RF time in AVNRT vs nonirrigated catheters.
- P=0.03
- n=200
Why the study?
Outcomes of slow pathway modification for AVNRT using irrigated, contact-force sensing RFA catheters have not been systematically evaluated.
Does an irrigated contact-force sensing radiofrequency ablation catheter improve procedural outcomes compared to a nonirrigated catheter in patients undergoing slow pathway modification for AVNRT?
Population
200 consecutive patients undergoing slow pathway modification for AVNRT
Comparison
3.5-mm ICFS RFA catheter vs 4-mm NI RFA catheter
Design
Retrospective cohort study with blinded analysis of electroanatomic maps
Authors
Discussion
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Implication
May inform catheter choice for AVNRT ablation; extends case reports but leaves open randomized confirmation.
Study Design
Type
Observational (n=200)
Blinding
Single-blind
Structured PICO
Does an irrigated contact-force sensing radiofrequency ablation catheter improve procedural outcomes compared to a nonirrigated catheter in patients undergoing slow pathway modification for AVNRT?
P
Population
200 consecutive patients undergoing slow pathway modification for atrioventricular nodal reentrant tachycardia (AVNRT)
I
Intervention
3.5-mm irrigated, contact-force sensing (ICFS) radiofrequency ablation catheter (n=134)
C
Comparator
4-mm nonirrigated (NI) radiofrequency ablation catheter (n=66)
O
Outcome
Acute procedural outcomes including total RF time, median procedure time, and proximity of ablation lesions to the His regionsurrogate
Main Result
Absolute Event Rate: 5.53% vs 6.24%
p-value: p=0.03
Irrigated contact-force sensing catheters for AVNRT ablation reduce RF time and allow ablation further from the His bundle compared to traditional nonirrigated catheters.
Cite This Study
Panday et al. (2023) conducted an observational in Atrioventricular nodal reentrant tachycardia (AVNRT) (n=200). 3.5-mm irrigated, contact-force sensing (ICFS) RFA catheter vs. 4-mm nonirrigated (NI) RFA catheter was evaluated on Total RF time (minutes) (p=0.03). Slow pathway modification for AVNRT using an irrigated contact-force sensing RFA catheter significantly reduced total RF time compared to a nonirrigated catheter (5.53 vs 6.24 min, p=0.03).