MagnetoHemoDynamics Effect on Electrocardiograms

Abstract : In presence of a high magnetic field, the blood flow in the aorta induces an electrical potential which is responsible for an increase of the T -wave in the electrocardiogram (ECG). This phenomenon may perturb ECG-gated imaging. The aim of this numerical study is to reproduce this experimental observation through computer simulations. The proposed model consists of three components: magnetohydrodynamics (MHD) in the aorta, bidomain equations in the heart and electrical diffusion in the rest of the body. These models are strongly coupled together and solved with finite elements. Some numerical results without and with a magnetic field are presented and discussed. When the magnetic field increases from B = 0 T to B = 3 T , it is observed numerically that the potential in the lead I of the ECG doubles during the T -wave, reaching the level of the QRS peak. All numerical computations were performed on a realistic "averaged" human model
Type de document :
Communication dans un congrès
Metaxas, Dimitris and Axel, Leon. FIMH 2011 - Sixth International Conference on Functional Imaging and Modeling of the Heart, May 2011, New-York, United States. Springer, 6666, pp.325-332, 2011, Lecture Notes in Computer Science. 〈10.1007/978-3-642-21028-0_42〉
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https://hal.inria.fr/hal-00652042
Contributeur : Jean-Frédéric Gerbeau <>
Soumis le : mercredi 14 décembre 2011 - 17:17:56
Dernière modification le : vendredi 16 novembre 2018 - 02:14:35

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Vincent Martin, Agnès Drochon, Odette Fokapu, Jean-Frédéric Gerbeau. MagnetoHemoDynamics Effect on Electrocardiograms. Metaxas, Dimitris and Axel, Leon. FIMH 2011 - Sixth International Conference on Functional Imaging and Modeling of the Heart, May 2011, New-York, United States. Springer, 6666, pp.325-332, 2011, Lecture Notes in Computer Science. 〈10.1007/978-3-642-21028-0_42〉. 〈hal-00652042〉

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