Wei H, Singer H
Technical University Hamburg-Harburg, F. R. of Germany.
Biomed Sci Instrum. 1993;29:473-80.
This paper presents an effective method for the treatment of anisotropic skeletal muscle layer in the forward calculation of ECG by FEM. The method can be used in principle to find the potential distribution of the torso surface and the current density of the epicardial surface at the same time on a theoretical electrocardiographic model. In this paper we examined theoretically the transformation relationship between the anisotropy in a local coordinate system and that in the global coordinate system, considering that the anisotropic conductivity of the skeletal muscle layer is orthogonal in the local coordinate system, but the components of the conductivity tensor may not be directed along the axes of the global coordinate system. In order to show the calculation accuracy of the method, we introduced an example that has an analytical solution. We found that the analytic solution and the numerical one are very close and agreeable.
本文提出了一种在有限元法进行心电图正向计算时处理各向异性骨骼肌层的有效方法。该方法原则上可用于在理论心电图模型上同时求出躯干表面的电位分布和心外膜表面的电流密度。本文从理论上研究了局部坐标系中的各向异性与全局坐标系中的各向异性之间的变换关系，考虑到骨骼肌层的各向异性电导率在局部坐标系中是正交的，但电导率张量的分量可能不沿全局坐标系的轴方向。为了展示该方法的计算精度，我们引入了一个有解析解的例子。我们发现解析解和数值解非常接近且吻合。
