Modeling of cardiac electrical activity for characterizing vortex components

In this study, source model for solving biomagnetic inverse problem is developed with a new method, where vortex components along with the flow component of the equivalent source is considered. The model is an aggregation of a single current dipole and a magnetic dipole. The single current dipole denotes the flow component while the magnetic dipole is an abstract of the vortex component of the biomagnetic source. Simulation results indicate that this model could be more efficient for modeling cardiac electrical activity, compared with single current dipole. Despite that this model is more complicated than the single current dipole model; simple algorithm can still be used for solving inverse problem with only small revision. Meaning of the model parameters solved from the inverse problem is also discussed.