Aimed-lead potentials on the heart in a concentric-spheres model, found as a weighted sum of the terms in a multipole inverse solution, were compared to those found using the boundary-element method. Relative errors were comparable when optimal regularization was used. The aimed-lead method was applied to the multipole inverse for a normal adult male obtained from 190 leads using an individualized torso model. As expected, the aimed-lead epicardial maps showed higher spatial frequencies than those seen on the body surface.