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Slow pathway elimination for atrioventricular nodal reentrant tachycardia with the 8-mm tip cryoablation catheter: an 18-month follow-up study

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Abstract

Purpose

The 9-French 8-mm tip cryoablation catheter confers a high rate of acute slow pathway (SP) elimination and an acceptable short-term outcome in patients with atrioventricular nodal reentrant tachycardia (AVNRT). The aim of this study was to investigate the long-term outcome of patients treated with this electrode in this indication.

Methods

Eighty-two patients (female = 52) with a mean age of 54.9 ± 17.7 years underwent SP elimination for typical AVNRT with the 8-mm tip cryocatheter in our institution between November 2009 to June 2012. Clinical and procedural characteristics were prospectively collected.

Results

Acute procedural success defined as AVNRT non-inducibility at the end of the procedure was obtained in 81/82 patients (98.7 %). Mean procedure duration and fluoroscopy time were 74.4 ± 28.7 min (range, 35–160 min) and 8.7 ± 5.3 min (range, 2–26 min), respectively. Mean number of energy applications was 4.0 ± 2.4 (range, 2–15). No permanent atrioventricular block was observed. Transient atrioventricular block occurred in 12 patients (14.6 %). Traumatic fast pathway conduction block occurred in one patient before cryoenergy delivery. Using an intention-to-treat analysis, 78 patients (95.1 %) remained free of AVNRT recurrence during a mean follow-up of 17.8 ± 9.3 months.

Conclusions

This study confirmed that the 8-mm tip cryocatheter is both safe and highly effective for SP conduction elimination in patients with AVNRT and demonstrated a low recurrence rate during a long-term follow-up.

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Correspondence to Michaël Peyrol.

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Peyrol, M., Sbragia, P., Uhry, S. et al. Slow pathway elimination for atrioventricular nodal reentrant tachycardia with the 8-mm tip cryoablation catheter: an 18-month follow-up study. J Interv Card Electrophysiol 37, 105–109 (2013). https://doi.org/10.1007/s10840-012-9768-0

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  • DOI: https://doi.org/10.1007/s10840-012-9768-0

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