99367 20220301144158.0 doi 10.23919/Eusipco47968.2020.9287670 sideral 122377 ART-2021-122377 eng Riccio, J. Universidad de Zaragoza (orcid)0000-0002-6264-4229 Omnipolar EGM voltage mapping for atrial fibrosis identification evaluated with an electrophysiological model 2021 Access copy available to the general public Unrestricted Atrial fibrillation (AF) is the most spread heart arrhythmia, whose mechanisms are not completely clear yet. Catheter ablation is a standard treatment, which isolates the area involved in the arrhythmia. Intracardiac electrograms (EGMs) are used to better understand the AF mechanisms and to find appropriate ablation sites. Bipolar EGMs (b-EGMs) are often employed, but their amplitude and shape depend on catheter orientation, limiting reliability. To avoid this uncertainty, an approach insensitive to catheter orientation, referred as Omnipolar EGM (OP-EGM) method, has been introduced, which uses an estimation of the electric field within a group of electrodes, referred as clique. In this work, we compare different mapping approaches based on b-EGMs and OP-EGM signals in simulation including fibrosis, so to evaluate their ability to detect fibrosis and reproduce the spatial distribution of the voltage. Maps have been computed using two clique configurations (square and triangular), introducing or not a previous time alignment of the b-EGMs. OP-EGM signals have been obtained by projecting the electric field along directions of its maximal excursion and its principal components. Results show that the proposed alignment of b-EGMs improves maps based on OP-EGM signals. Both cliques configurations present good performance, in terms of fibrosis detection and correlation with the reference voltage maps. info:eu-repo/grantAgreement/ES/DGA-FSE/T39-20R-BSICoS group info:eu-repo/grantAgreement/EC/H2020/766082/EU/MultidisciplinarY training network for ATrial fibRillation monItoring, treAtment and progression/MY-ATRIA This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 766082-MY-ATRIA info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Alcaine, A. (orcid)0000-0002-0166-2837 Rocher, S. Laguna, P. Universidad de Zaragoza (orcid)0000-0003-3434-9254 Saiz, J. Martínez, J.P. Universidad de Zaragoza (orcid)0000-0002-7503-3339 5008 800 Universidad de Zaragoza Dpto. Ingeniería Electrón.Com. Área Teoría Señal y Comunicac. 2021-January (2021), 920-924 Eur. Signal Process. Conf. European Signal Processing Conference 2076-1465 2526853 http://zaguan.unizar.es/record/99367/files/texto_completo.pdf Versión publicada 2406237 http://zaguan.unizar.es/record/99367/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:99367 articulos driver 2022-03-01-14:38:18 ARTICLE