Abstract
This study proposes a new method for estimating the epicardial potential distribution from the measured body surface potential mapping. The method uses the boundary integral equations to describe the relation between body surface and applies the mode matching method to solve these equations nummerically. In order to suppress the instability of higher mode estimation of epicardial potentials, the expansion series is truncated optimally, and Phillips-Twomay constrained least square method is applied to determine the expansion coefficients.
Animal experiment was done by a canine in which electrodes were attached both on body surface and epicardium. Epicardial potentials estimated from the measured body surface potentials were compared with the measured epicardial ones. The correlation coefficients between measured and estimated epicardial potentials were ranged from 0.5 to 0.8 with average 0.669, but the main features of the measured epicardial potentials were well recognized in estimated ones.
