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Journal of Interventional Cardiac Electrophysiology

Published in:

Open Access 01-06-2018

Atrial fibrillation ablation using very short duration 50 W ablations and contact force sensing catheters

Authors: Roger A. Winkle, Ryan Moskovitz, R. Hardwin Mead, Gregory Engel, Melissa H. Kong, William Fleming, Jonathan Salcedo, Rob A. Patrawala, John H. Tranter, Isaac Shai

Published in: Journal of Interventional Cardiac Electrophysiology | Issue 1/2018

Abstract

Purpose

The optimal radiofrequency (RF) power and lesion duration using contact force (CF) sensing catheters for atrial fibrillation (AF) ablation are unknown. We evaluate 50 W RF power for very short durations using CF sensing catheters during AF ablation.

Methods

We evaluated 51 patients with paroxysmal (n = 20) or persistent (n = 31) AF undergoing initial RF ablation.

Results

A total of 3961 50 W RF lesions were given (average 77.6 ± 19.1/patient) for an average duration of only 11.2 ± 3.7 s. As CF increased from < 10 to > 40 g, the RF application duration decreased from 13.7 ± 4.4 to 8.6 ± 2.5 s (p < 0.0005). Impedance drops occurred in all ablations, and for patients in sinus rhythm, there was loss of pacing capture during RF delivery suggesting lesion creation. Only 3% of the ablation lesions were at < 5 g and 1% at > 40 g of force. As CF increased, the force time integral (FTI) increased from 47 ± 24 to 376 ± 102 gs (p < 0.0005) and the lesion index (LSI) increased from 4.10 ± 0.51 to 7.63 ± 0.50 (p < 0.0005). Both procedure time (101 ± 19.7 min) and total RF energy time (895 ± 258 s) were very short. For paroxysmal AF, the single procedure freedom from AF was 86% at 1 and 2 years. For persistent AF, it was 83% at 1 year and 72% at 2 years. There were no complications.

Conclusions

Short duration 50 W ablations using CF sensing catheters are safe and result in excellent long-term freedom from AF for both paroxysmal and persistent AF with short procedure times and small amounts of total RF energy delivery.

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Title: Atrial fibrillation ablation using very short duration 50 W ablations and contact force sensing catheters
Authors: Roger A. Winkle
Ryan Moskovitz
R. Hardwin Mead
Gregory Engel
Melissa H. Kong
William Fleming
Jonathan Salcedo
Rob A. Patrawala
John H. Tranter
Isaac Shai
Publication date: 01-06-2018
Publisher: Springer US
Published in: Journal of Interventional Cardiac Electrophysiology / Issue 1/2018
Print ISSN: 1383-875X
Electronic ISSN: 1572-8595
DOI: https://doi.org/10.1007/s10840-018-0322-6

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Atrial fibrillation ablation using very short duration 50 W ablations and contact force sensing catheters

Abstract

Purpose

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Purpose

Methods

Results

Conclusions

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