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We considered the Eikonal-diffusion equation and to recover the electrical activation maps in the myocardium. The model was calibrated by using activation times acquired in the coronary sinus (CS) branches or in the CS solely with an electroanatomic mapping system (EAMS) during cardiac resynchronization therapy (CRT). We applied our computational tool to ten patients founding an excellent accordance with EAMS measures; in particular, the error for LEAS location was less than 4\u00a0mm. We also calibrated our model using only information in the CS, still obtaining an excellent agreement with the measured LEAS. The proposed tool was able to accurately reproduce the electrical activation maps and in particular LEAS location in the CS branches, with an almost real-time computational effort, regardless of the presence of myocardial fibrosis, even when information only at CS was used to calibrate the model. This could be useful in the clinical practice since LEAS is often used as a target site for the left lead placement during CRT.<\/jats:p>\n Graphical abstract<\/jats:bold><\/jats:p>\n Overall picture of the computational pipeline for the estimation of LEAS<\/jats:p>","DOI":"10.1007\/s11517-022-02610-3","type":"journal-article","created":{"date-parts":[[2022,6,21]],"date-time":"2022-06-21T19:39:42Z","timestamp":1655840382000},"page":"2307-2319","update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Computational electrophysiology of the coronary sinus branches based on electro-anatomical mapping for the prediction of the latest activated region"],"prefix":"10.1007","volume":"60","author":[{"ORCID":"http:\/\/orcid.org\/0000-0001-9872-5410","authenticated-orcid":false,"given":"Christian","family":"Vergara","sequence":"first","affiliation":[]},{"ORCID":"http:\/\/orcid.org\/0000-0002-9477-4028","authenticated-orcid":false,"given":"Simone","family":"Stella","sequence":"additional","affiliation":[]},{"given":"Massimiliano","family":"Maines","sequence":"additional","affiliation":[]},{"given":"Pasquale Claudio","family":"Africa","sequence":"additional","affiliation":[]},{"given":"Domenico","family":"Catanzariti","sequence":"additional","affiliation":[]},{"given":"Cristina","family":"Dematt\u00e8","sequence":"additional","affiliation":[]},{"given":"Maurizio","family":"Centonze","sequence":"additional","affiliation":[]},{"ORCID":"http:\/\/orcid.org\/0000-0002-8130-0114","authenticated-orcid":false,"given":"Fabio","family":"Nobile","sequence":"additional","affiliation":[]},{"ORCID":"http:\/\/orcid.org\/0000-0002-5947-6885","authenticated-orcid":false,"given":"Alfio","family":"Quarteroni","sequence":"additional","affiliation":[]},{"given":"Maurizio","family":"Del Greco","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2022,6,21]]},"reference":[{"key":"2610_CR1","unstructured":"Colli Franzone P, Pavarino LF, Savar\u00e9 G. 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Electrical mapping and MRI acquisition were performed for diagnostic and therapeutic purposes independently of this study.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Patient consent"}},{"value":"Maurizio Del Greco has received fees from Abbott. The other authors reported no conflict of interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}}]}}