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Journal of Interventional Cardiac Electrophysiology

Published in:

01-09-2012

Treatment of atrioventricular nodal re-entrant tachycardia by cryoablation with an 8-mm-tip catheter versus radiofrequency ablation

Authors: Ngai-yin Chan, Ngai-shing Mok, Chi-chung Choy, Chun-leung Lau, Pui-shan Chu, Ho-chuen Yuen, Suet-ting Lau

Published in: Journal of Interventional Cardiac Electrophysiology | Issue 3/2012

Abstract

Purpose

Catheter cryoablation (CRYO) may eliminate inadvertent atrioventricular block (AVB) in the treatment of atrioventricular nodal reentrant tachycardia (AVNRT). However, higher recurrence was observed with CRYO delivered by 4 mm or 6 mm-tip catheter. This study was performed to investigate whether a comparably low treatment failure and recurrence rate as in radiofrequency (RF) ablation is achievable by CRYO with an 8-mm-tip catheter.

Methods

This is a retrospective case–control study including 40 patients with AVNRT treated with CRYO (n = 20) using an 8 mm-tip catheter or RF ablation (n = 20) from March 2009 to March 2011. Treatment failure was defined as the composite of acute procedural failure including inadvertent permanent AVB and documented recurrence.

Results

Acute procedural success of 90% (18/20) and 95% (19/20) were achieved in CRYO and RF ablation group, respectively (p = 0.998), with no permanent AVB in either group. With Kaplan–Meier analysis, there was no significant difference between the treatment groups in terms of recurrence rate (5.6% [1/18] vs. 0%; log-rank test p = 0.304) and treatment failure (15% [3/20] vs. 5% [1/20]; log-rank test p = 0.301). Shorter fluoroscopy time (15 ± 8.6 vs. 25.2 ± 12.1 min; p = 0.005) and more energy applications (median 4 [2–15] vs. 2 [1–8]; p = 0.005) were observed in the CRYO group compared with RF ablation group.

Conclusions

Compared to RF ablation, CRYO with an 8-mm-tip catheter for treating AVNRT achieves a comparable acute procedural success, comparably low recurrence rate and composite endpoint of treatment failure. Shorter fluoroscopy time and more energy applications were observed in the CRYO group.

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Title: Treatment of atrioventricular nodal re-entrant tachycardia by cryoablation with an 8-mm-tip catheter versus radiofrequency ablation
Authors: Ngai-yin Chan
Ngai-shing Mok
Chi-chung Choy
Chun-leung Lau
Pui-shan Chu
Ho-chuen Yuen
Suet-ting Lau
Publication date: 01-09-2012
Publisher: Springer US
Published in: Journal of Interventional Cardiac Electrophysiology / Issue 3/2012
Print ISSN: 1383-875X
Electronic ISSN: 1572-8595
DOI: https://doi.org/10.1007/s10840-012-9670-9

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Treatment of atrioventricular nodal re-entrant tachycardia by cryoablation with an 8-mm-tip catheter versus radiofrequency ablation

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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