alexa Electric and magnetic fields from two-dimensional anisotropic bisyncytia.
Engineering

Engineering

Journal of Electrical & Electronic Systems

Author(s): Sepulveda NG, Wikswo JP Jr

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Abstract Cardiac tissue can be considered macroscopically as a bidomain, anisotropic conductor in which simple depolarization wavefronts produce complex current distributions. Since such distributions may be difficult to measure using electrical techniques, we have developed a mathematical model to determine the feasibility of magnetic localization of these currents. By applying the finite element method to an idealized two-dimensional bisyncytium with anisotropic conductivities, we have calculated the intracellular and extracellular potentials, the current distributions, and the magnetic fields for a circular depolarization wavefront. The calculated magnetic field 1 mm from the tissue is well within the sensitivity of a SQUID magnetometer. Our results show that complex bisyncytial current patterns can be studied magnetically, and these studies should provide valuable insight regarding the electrical anisotropy of cardiac tissue.
This article was published in Biophys J and referenced in Journal of Electrical & Electronic Systems

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