The effects of noise and errors in heart size on numerical techniques for the inverse problem of electrocardiography.

In this study we examine the effects of both noise and geometrical errors on four numerical methods proposed for solving the inverse problem of electrocardiography. The heart-body system is modeled using an inhomogeneous eccentric sphere model. The cardiac source is modeled as a double layer spherical cap with either an anterior or posterior location. Epicardial potentials determined using the numerical techniques were compared with the analytically determin potentials in the presence of both noise and errors in assumed geometry.