August 1, 2022
Catheter Ablation of Atrioventricular Nodal Reentrant Tachycardia with an Irrigated Contact Force Sensing Radiofrequency Ablation Catheter
Key result
Irrigated contact-force RFA for AVNRT is linked to ~11% shorter RF time versus non-irrigated catheters.
- P=0.03
- n=200
Why the study?
Slow pathway modification for AVNRT using irrigated, contact-force sensing catheters has been reported, but outcomes have not been systematically evaluated compared to traditional non-irrigated catheters.
Does an irrigated, contact-force sensing radiofrequency ablation catheter improve procedural outcomes compared to a non-irrigated catheter in patients undergoing slow pathway modification for AVNRT?
Population
200 consecutive patients undergoing slow pathway modification for AVNRT
Comparison
Irrigated, contact-force sensing 3.5mm catheter vs 4mm non-irrigated catheter
Design
Retrospective cohort study with blinded electroanatomic map analysis
Authors
Discussion
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Member takes
Implication
Shorter RF times associated with irrigated contact-force catheters in AVNRT; leaves open whether outcomes improve in randomized trials.
Study Design
Type
Cohort (n=200)
Structured PICO
Does an irrigated, contact-force sensing radiofrequency ablation catheter improve procedural outcomes compared to a non-irrigated catheter in patients undergoing slow pathway modification for AVNRT?
P
Population
200 consecutive patients undergoing slow pathway modification for AVNRT.
E
Exposure
Irrigated, contact-force sensing (ICFS) 3.5mm radiofrequency ablation catheter
C
Comparator
4mm non-irrigated (NI) radiofrequency ablation catheter
O
Outcome
Acute procedural outcomes including total radiofrequency 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
Using an irrigated, contact-force sensing radiofrequency ablation catheter for AVNRT slow pathway modification reduces total RF time and allows ablation further from the His bundle compared to traditional non-irrigated catheters.
Cite This Study
Panday et al. (2022) conducted a cohort in Atrioventricular Nodal Reentrant Tachycardia (AVNRT) (n=200). Irrigated, contact-force sensing (ICFS) RFA catheter vs. 4mm non-irrigated (NI) RFA catheter was evaluated on Total RF time (p=0.03). Slow pathway modification for AVNRT using an irrigated, contact-force sensing RFA catheter significantly reduced total RF time compared to a non-irrigated catheter (5.53 vs 6.24 min, p=0.03).