Body surface potential map simulation method based on double-domain model and finite element method

The invention provides a body surface potential map simulation method based on a double-domain model and a finite element method, and the method comprises the following steps: carrying out geometric modeling on a trunk, a lung and a heart, including setting corresponding parameters and a calculation region of a trunk-lung-heart model, and obtaining the trunk-lung-heart model; defining electrical conduction activity for the heart model by adopting a double-domain model to obtain a heart excitation conduction sequence; for the trunk model and the lung model, selecting a Laplacian equation as a control equation of potential in a passive volume conductor, namely the lung and the trunk, and obtaining a global matrix by adopting a finite element method; and solving the global matrix by using a gradient iterative algorithm, and solving the body surface potential of the trunk by using a four-order Gaussian quadrature algorithm to obtain the body surface potential map. According to the body surface potential map simul