Solving the ECGI Problem with Known Locations of Scar Regions

Abstract

We propose a methodology to take into account the location of scars in ECGI problem. The method is to consider the whole body, including blood, heart and remaining volume as a conductor with an electric current source field localized in the heart. We identify the source best matching a given body surface potential map, by solving the classical quadratic optimization problem with a Tikhonov regularization term. The method behaves better than the MFS method in presence of a scar. The correlation coefficients of the activation times around the scar are improved up to 10% on the epicardium, and 7% on the endocardium, by adapting the Tikhonov regularization parameter and conductivity coefficient in the scar.