Relationship between lesion formation and electrophysiological responses using catheters equipped with mini-electrodes in chronic atrial fibrillation

Avitall, Boaz; Kalinski, Arthur; Horbal, Piotr; Koblish, Josef

doi:10.1016/j.hrthm.2017.01.041

Cited by 5 publications

(2 citation statements)

References 15 publications

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“…In animal models, changes in the intracardiac electrograms derived from mini electrodes could be taken as a surrogate parameter for monitoring of ablation lesion maturation [6,7] and may prevent unnecessarily prolonged ablation application [5], thus reducing extracardiac injuries [6].…”

Section: Introductionmentioning

confidence: 99%

Value of Mini Electrodes for Mapping Myocardial Arrhythmogenic Substrate—The Influence of Tip-to-Tissue Angulation and Irrigation Flow on Signal Quality

Bickel

Lewalter

Fischer

et al. 2022

JVD

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Background: The use of mini electrodes with a small surface and narrow electrode-to-electrode spacing is believed to lead to a higher electrical resolution. Until now, the effects of tip-to-tissue contact, angulation, and irrigation on signal quality and morphology are unknown. Methods: The beating heart of an open-chest pig was examined while controlling the angulation and contact between the catheter tip and myocardial tissue, as well as the irrigation of the catheter tip. The mini electrodes were mounted onto commercially available 8 mm non-irrigated and 4 mm irrigated tip catheters. Different electrode interconnections, angulations, contact forces, and irrigation flow were analyzed and compared to signals recorded from conventional electrodes. Results: A total of 63 electrode samples of 21 defined, stable settings, each lasting 30 s, were analyzed. (1) Tissue contact of mini electrodes was given as soon as the conventional tip electrode showed tissue contact. (2) Angulation of the tip-to-tissue contact showed a trend towards changes in the integral of signals derived from mini electrodes, and no significant changes were seen in signals derived from conventional or mini electrodes. (3) Irrigation flow surrounding the mini electrodes did not influence signals derived from mini electrodes, whereas conventional electrodes showed signals with a longer duration under higher irrigation. Conclusion: Mini electrodes are robust to contact force and irrigation flow regarding signal quality, whereas signals of conventional electrodes are affected by irrigation flow, leading to substantial changes in signal duration and kurtosis. Signals of mini electrodes are sensitive to local electrical changes because of a high local resolution.

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Section: Introductionmentioning

confidence: 99%

Value of Mini Electrodes for Mapping Myocardial Arrhythmogenic Substrate—The Influence of Tip-to-Tissue Angulation and Irrigation Flow on Signal Quality

Bickel

Lewalter

Fischer

et al. 2022

JVD

View full text Add to dashboard Cite

show abstract

“…In this paper, Avital and colleagues report their findings using mini electrode (ME) mounted irrigated and standard ablation catheters (5). Specifically, in a canine model of chronic atrial fibrillation (>1 year), they report their experience of using MEs mounted to a 4mm irrigated and an 8mm standard ablation catheter (BSc).…”

mentioning

confidence: 99%

Transmurality: Catch me if you can

Dandamudi

2017

Heart Rhythm

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Superior vena cava isolation using a novel ablation catheter incorporating local impedance monitoring

Miyazaki

Hasegawa

Mukai

et al. 2021

J Interv Card Electrophysiol

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Relationship between lesion formation and electrophysiological responses using catheters equipped with mini-electrodes in chronic atrial fibrillation

Cited by 5 publications

References 15 publications

Value of Mini Electrodes for Mapping Myocardial Arrhythmogenic Substrate—The Influence of Tip-to-Tissue Angulation and Irrigation Flow on Signal Quality

Value of Mini Electrodes for Mapping Myocardial Arrhythmogenic Substrate—The Influence of Tip-to-Tissue Angulation and Irrigation Flow on Signal Quality

Transmurality: Catch me if you can

Superior vena cava isolation using a novel ablation catheter incorporating local impedance monitoring

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