【摘要】 目的探讨求解体外除颤时胸腔电场分布的集成仿真分析方法,为生物电场理论的临床应用研究提供参考。方法分析人体胸腔的生物电容积导体属性,给出描述心律失常的体外电除颤时胸腔电场的数理方程;进而采用SCIRun有限元分析工具对胸腔电场分布进行集成仿真求解。结果通过数值计算求解,获得了放电过程中胸腔各处的电势、电压梯度线、等势面,及心脏区域电压梯度值等多种电场分布数据。结论应用有限元集成求解方法分析体外除颤时人体胸腔复杂电场分布是可行的,对除颤技术的临床研究和方法改进具有一定的指导意义。更多还原

【Abstract】 Objective To explore an integrated solution method to model and simulate electric-field distribution under transthoracic defibrillation and promote the pertinent clinical research based on bioelectric field theory.Methods The conductivity properties of bioelectric conductors of the human torso were firstly analyzed.As a typical example of bioelectric field in the human torso,the electric field produced by an applied defibrillation current on the torso was then formulated mathematically.Furthermore,through the software package of SCIRun based on the finite element method,an integrated solution approach was presented to numerically model and simulate the electric-field distribution in torso.Results Multiform results of the electric-field distribution,such as the potential values,the potential gradient streamlines and the potential isosurface etc.,were achieved and depicted spatially in whole torso using the integrated solution method.And the results of the myocardial potential density distributions were analyzed especially.Conclusion The preliminary results indicate that the proposed integrated method to model and simulate the electric-field distribution of the complex torso is feasible,which can provide the practicable approach for clinic research of transthoracic defibrillation.更多还原