Influence of spatial conductivity distribution on relative contributions to ICG signal from thorax-FEM model study

A three-dimensional finite element model of the thorax and neck was constructed to investigate the influence of the lungs conductivity on relations between the impedance changes associated with various physiological events during systole. It has been found that these relations depend strongly on lungs´ conductivity. This dependence has been verified for two arrays of electrodes. The results suggest that for estimation of the aorta or ventricle contribution correctly more simultaneous and independent measurements must be done.