Comparison of 6-mm Versus 8-mm-Tip Cryoablation Catheter for the Treatment of Atrioventricular Nodal Reentrant Tachycardia in Children: A Prospective Study

Abstract

Due to its safety profile, cryoablation (Cryo) for atrioventricular nodal reentrant tachycardia (AVNRT) is more commonly preferred over radiofrequency (RF) ablation in children in recent years. Recent studies demonstrated high long-term success rates comparable to radiofrequency ablation. The aim of this prospective study was to compare the efficacy and safety of an 8-mm-tip versus 6-mm-tip Cryo catheter in the treatment of AVNRT in children. A total of 125 consecutive patients over 10 years of age with AVNRT were included. EnSite system (St. JudeMedical, St Paul, MN, USA) was used to reduce or eliminate fluoroscopy. The acute procedural success was 100% in both groups. The prodecure duration for the 8-mm-tip group was shorter (151.6 ± 63.2 vs. 126.6 ± 36.7 min, p < 0.01, respectively). Fluoroscopy was used in only 7 patients. The mean follow-up duration was 14.6 ± 8.4 months (median 13.5 months, min. 3 months and max. 27 months). The recurrence rate for AVNRT was also comparable between the two groups (6-mm tip: 9.6 vs. 8-mm tip: 8%). Cryo of AVNRT is a safe and effective procedure with comparable acute and mid-term follow-up success rates using 6-mm and 8-mm-tip catheters in children. In addition, procedure duration is shorter with an 8-mm-tip Cryo catheter.

Zero-fluoroscopy approach for ablation of supraventricular tachycardia using the Ensite NavX system: a multicenter experience

“…Ensite NavX system can be used for accurate navigation. The advantages of three dimensional mapping system has been widely discussed in previous studies [8,12,[25][26][27][28][29]. According to our experience, the guidewires Fig.…”

Efficacy and safety between radiofrequency ablation and types of cryoablation catheters for atrioventricular nodal reentrant tachycardia: A Network Meta‐analysis and Systematic Review

“…Consequently, our final analysis included 27 studies 7–9,16–39 (7 randomized studies and 20 observational studies analyzing 5110 patients who have AVNRT indicated for ablation. Cryoablations were performed 25 studies which categorized into 10 studies with 4‐mm tip catheter, 12 studies with 6‐mm tip catheter, and 3 studies with 8‐mm tip catheter.…”

“…A total of 27 studies 7–9,16–39 with retrievable information were considered for analysis. We conducted a descriptive assessment to evaluate the acute procedural success rate for each technique.…”

“…An analysis was conducted on a total of 27 studies 7–9,16–39 to assess the long‐term procedural success rates for each technique. Across all available studies, the overall success rates ranged from 72.22% to 100%.…”

“…A total of 21 studies 8,9,[17][18][19][20][21][22][23][24][25][26][27][28][31][32][33]35,36,38,39 were included in the analysis of permanent AV block, involving 3894 patients. While there were no specific reports on the management of AV block, we inferred that a permanent pacemaker would likely be necessary for most cases of permanent AV block.…”