High-Resolution Mapping of Ventricular Scar: Evaluation of a Novel Integrated Multielectrode Mapping and Ablation Catheter

JACC. Clinical Electrophysiology
Eran LeshemElad Anter

Abstract

This study sought to evaluate an investigational catheter that incorporates 3 microelectrodes embedded along the circumference of a standard 3.5-mm open-irrigated catheter. Mapping resolution is influenced by both electrode size and interelectrode spacing. Multielectrode mapping catheters enhance mapping resolution within scar compared with standard ablation catheters; however, this requires the use of 2 separate catheters for mapping and ablation. Six swine with healed infarction and 2 healthy controls underwent mapping of the left ventricle using a THERMOCOOL SMARTTOUCH SF catheter with 3 additional microelectrodes (0.167 mm2) along its circumference (Qdot, Biosense Webster, Diamond Bar, California). Mapping resolution in healthy and scarred tissue was compared between the standard electrodes and microelectrodes using electrogram characteristics, cardiac magnetic resonance, and histology. In healthy myocardium, bipolar voltage amplitude was similar between the standard electrodes and microelectrodes, with a fifth percentile of 1.19 and 1.30 mV, respectively. In healed infarction, the area of low bipolar voltage (defined as <1.5 mV) was smaller with microelectrodes (16.8 cm2 vs. 25.3 cm2; p = 0.033). Specifically, the microele...Continue Reading

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Citations

Jun 30, 2018·Journal of Cardiovascular Electrophysiology·Felix Bourier, Pierre Jais
Oct 17, 2018·Current Opinion in Cardiology·Mark J Shen, Bradley P Knight
Jan 8, 2019·Journal of Cardiovascular Electrophysiology·Victor BazanFrancis E Marchlinski
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Dec 13, 2019·Journal of Cardiovascular Electrophysiology·Maria TerricabrasAtul Verma
Jan 28, 2020·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·Michael BarkaganElad Anter
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Dec 31, 2020·Korean Circulation Journal·Timothy CampbellSaurabh Kumar
May 13, 2021·Future Cardiology·Jean-Yves WielandtsSébastien Knecht
May 11, 2021·Frontiers in Physiology·Stephen GaetaCraig Henriquez
May 2, 2021·Pacing and Clinical Electrophysiology : PACE·Takashi NakashimaFrédéric Sacher
Jul 20, 2021·Circulation. Arrhythmia and Electrophysiology·Hagai D YavinElad Anter

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