A simulation study of body surface Laplacian ECG maps using a spherical volume conductor model

The goal of this study was to examine the resolution of the body surface Laplacian maps (BSLMs) in localizing multiple simultaneously active myocardial electrical events located in the anterior wall of the heart by computer simulation. A conductive sphere was used to approximate the torso volume conductor. Two current dipoles were used to approximate two localized wavefronts inside the myocardium. The BSLMs were computed from the dipole sources and compared with the known dipole sources and the corresponding body surface potential maps (BSPMs). For the simulated two concurrent myocardial events located in the anterior wall of the heart, the BSLMs observed showed highly localized spatial patterns which resolve well the configurations of the two dipole sources.<>