LAGRACIE, Emma; WEYNANS, Lisl; COUDIÈRE, Yves

doi:10.22489/CinC.2023.106

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Licence d’utilisation du document

LAGRACIE, Emma
Modélisation et calculs pour l'électrophysiologie cardiaque [CARMEN]
Institut de Mathématiques de Bordeaux [IMB]
Institut de rythmologie et modélisation cardiaque [Pessac] [IHU Liryc]

WEYNANS, Lisl
Modélisation et calculs pour l'électrophysiologie cardiaque [CARMEN]
Institut de Mathématiques de Bordeaux [IMB]
Institut de rythmologie et modélisation cardiaque [Pessac] [IHU Liryc]

COUDIÈRE, Yves
Modélisation et calculs pour l'électrophysiologie cardiaque [CARMEN]
Institut de rythmologie et modélisation cardiaque [Pessac] [IHU Liryc]
Institut de Mathématiques de Bordeaux [IMB]

Langue

Communication dans un congrès

Ce document a été publié dans

CinC 2023 - 50th Computing in Cardiology Conference, 2023-10-01, Atlanta. 2023-12-26

Résumé en anglais

In order to establish a link between the activation map and the body surface signals, we want to compute body potentials from activation maps and a frontlike approximation of the activation of the heart. To do so, two formulations that map the extracardiac potential from the transmembrane voltage naturally emerge from the bidomain model. Either the extracellular/extracardiac potential solves a Laplace equation with discontinuous conductivity coefficient and ionic current as a source (Source Formulation F1); or the quasi-stationary electrical balance between the intra- and extracellular fields (Balance Formulation F2). In this work, we compare F1 and F2, to determine which formulation is the most relevant to use. We compute reference activation map $\psi$ , transmembrane voltage $v$ and body surface map $u$ with a bidomain 2D code. We design two alternative shapes $\tilde{v}$ for a frontlike approximation of $v$ . Afterwards, two extracellular / extracardiac potentials are computed from the activation time $\psi$ and $\tilde{v}$ , using the two different formulations. Then the extracardiac potentials solutions of F1 and F2 are compared respectively to the solution of the bidomain $u$ . Results show that the Balance Formulation F2 is robust to the input data ($\tilde{v}$ and $\psi$). On the contrary, the Source Formulation F1 is very unstable and generates very large errors on the body surface map.< Réduire

URI

https://oskar-bordeaux.fr/handle/20.500.12278/190280

DOI

http://dx.doi.org/10.22489/CinC.2023.106

Project ANR

L'Institut de Rythmologie et modélisation Cardiaque - ANR-10-IAHU-0004

Origine

Importé de hal

Unités de recherche

Institut de Mathématiques de Bordeaux (IMB) - UMR 5251