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Mini-electrodes help identifying hidden slow conduction during ventricular tachycardia substrate ablation |
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| Authors: | David Soto-Iglesias David Andreu Beatriz Jáuregui Markus Linhart Lluis Mont Antonio Berruezo |
| Affiliation: | 1. Hospital Clínic, Arrhythmia Section, Cardiology Department, Barcelona, Spain;2. Boston Scientific, Spain;3. Centro de Investigación Biomédica en Red (CIBER Cardiovascular), Instituto de Salud Carlos III, Madrid, Spain;4. Teknon Medical Center, Barcelona, Spain;5. Institut D''Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain |
| Abstract: | A 69-year-old male with dilated non-ischemic cardiomyopathy and history of sustained monomorphic VT (SMVT) underwent an unsuccessful VT substrate ablation due to the proximity of the earliest activation site to the conduction system. A second attempt was performed using an ablation catheter with mini-electrodes (ME) and multiple extrastimuli to unveil hidden slow conduction (HSC) sites, allowing the performance of a successful ablation. No SMVT was induced thereafter.ME-obtained electrograms permit to accurately localize areas of HSC sites within ventricular tachycardia (VT) substrates. In our case, this allowed safe ablation during sinus rhythm to eliminate the VT substrate. |
| Keywords: | Mini-electrodes Hidden slow conduction Multiple extrastimuli Ventricular tachycardia Catheter ablation Substrate ablation |
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