Quantitative 2-D analysis of the heart electrical activity dependence with tissue conductivity using the MagNet software program

Michael, Christian; Uzunoglu, Nikolaos

dc.contributor.author	Michael, Christian	en
dc.contributor.author	Uzunoglu, Nikolaos	en
dc.date.accessioned	2014-03-01T02:41:10Z
dc.date.available	2014-03-01T02:41:10Z
dc.date.issued	1996	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30399
dc.subject	Charge Distribution	en
dc.subject	Current Density	en
dc.subject	Electrocardiography	en
dc.subject	Human Body	en
dc.subject	Inverse Problem	en
dc.subject.other	Boundary conditions	en
dc.subject.other	Computer aided analysis	en
dc.subject.other	Computer simulation	en
dc.subject.other	Current density	en
dc.subject.other	Electric charge	en
dc.subject.other	Electric conductivity	en
dc.subject.other	Finite element method	en
dc.subject.other	Laplace transforms	en
dc.subject.other	Mathematical models	en
dc.subject.other	Physiological models	en
dc.subject.other	Tissue	en
dc.subject.other	Abstract only	en
dc.subject.other	Inverse problem in electrocardiography (IECG)	en
dc.subject.other	Software package MagNet	en
dc.subject.other	Electrocardiography	en
dc.title	Quantitative 2-D analysis of the heart electrical activity dependence with tissue conductivity using the MagNet software program	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/AEM.1996.872889	en
heal.identifier.secondary	http://dx.doi.org/10.1109/AEM.1996.872889	en
heal.publicationDate	1996	en
heal.abstract	In order to solve the so called inverse problem in electrocardiography (IECG) in this study we try to analyze, like a first step, the variation of the heart potential (charges) with conductivity in each of the considering model tissues. In other words, we want to determine the cardiac potential distribution in 39 sagittal sections of the human body. In this way knowing the conductivities of each human tissue: bone, muscle, heart muscle, lung, fat, blood, and also the cardiac charge distribution (like current density) for each sagittal section. The unique source of current in the considered human body zone is the heart. With these hypotheses we start a particular analysis using `MagNet 2D' Software Program. Firstly with a suppositional model of the human sagittal section in the heart zone (one section from the 39 existing), we had constructed with MagNet (particularly with Draw2D section of the software) a MagNet simplified model (using a triangular finite element mesh grid consisting in about 700 triangle elements and 400 points). Taking into account the `MagNet' capability to solve electromagnetic field problems we solve a first approximation of the general equation ▽σ·▽φ+σ·▽2φ = ρ(r) with the Laplace equation: ▽2φ = ρ(r). In the above equations: φ - is the electric scalar potential, ρ - is the charge density inside the heart, σ - is the tissue conductivity. This equation is solved using the finite element method with Dirichlet type boundaries which was offered by MagNet possibilities and gave the electric field distribution in the sagittal section of the heart zone.	en
heal.publisher	IEEE	en
heal.journalName	Trans Black Sea Region Symposium on Applied Electromagnetism	en
dc.identifier.doi	10.1109/AEM.1996.872889	en