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Long-term outcomes of remote magnetic navigation for ablation of supraventricular tachycardias

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Abstract

Background

Little is known about the long-term outcomes of catheter ablation of supraventricular tachycardia (SVT) using remote magnetic navigation system (RMN).

Methods

One hundred twenty patients underwent catheter ablation of SVTs with RMN (Niobe, Stereotaxis, USA): atrioventricular nodal re-entrant tachycardia (AVNRT; n = 59), atrioventricular re-entrant tachycardia (AVRT; n = 45), and focal atrial tachycardia (AT, n = 16). The outcome of AVRT with right free wall accessory pathway was compared with those of a group of 26 consecutive patients undergoing manual ablation.

Results

Mean follow-up period was 2.2 ± 1.4 years. Overall arrhythmia-free survival was 86 %; AVRT (77 %), AVNRT (96 %), and focal AT (71 %). After the learning period (initial 50 cases), procedural outcomes had improved for AVRT and AVNRT (91 % in overall group, 90 % in AVRT group, 100 % in AVNRT group, and 68 % in focal AT group). The recurrence-free rate was higher for the free wall accessory pathways than those of the other sites (92 vs. 73 %, log-rank P = 0.06). Furthermore, when it is confined for the right free wall accessory pathway, RMN showed excellent long-term outcome (7/7, 100 %) compared to the results of manual approach (18/26, 69.2 %, log-rank P = 0.07).

Conclusions

RMN showed favorable long-term outcomes for the ablation of SVT. In our experience, RMN-guided ablation may be associated with a higher success rate as compared to manual ablation when treating right-sided free wall pathways.

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Acknowledgments

We thank Jeong-Wook Park, Young-Woong Ha, and Bo-Kyung Kim for providing sincere assistance in clinical and electrocardiographic data acquisition and measurement.

Conflict of interest

None.

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Authors and Affiliations

  1. Division of Cardiology, Department of Internal Medicine, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, 222 Banpo-daero, Seocho-gu, Seoul, 137-701, South Korea

    Sung-Hwan Kim, Yong-Seog Oh, Dong-Hwi Kim, Ik Jun Choi, Tae-Seok Kim, Woo-Seung Shin, Ji-Hoon Kim, Sung-Won Jang, Man Young Lee & Tai-Ho Rho

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  1. Sung-Hwan Kim
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  2. Yong-Seog Oh
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  3. Dong-Hwi Kim
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Correspondence to Yong-Seog Oh.

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Kim, SH., Oh, YS., Kim, DH. et al. Long-term outcomes of remote magnetic navigation for ablation of supraventricular tachycardias. J Interv Card Electrophysiol 43, 187–192 (2015). https://doi.org/10.1007/s10840-015-9991-6

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  • DOI: https://doi.org/10.1007/s10840-015-9991-6

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