COMPARISON OF BODY-SURFACE POTENTIAL MAPS SIMULATED WITH ISOTROPIC AND ANISOTROPIC COMPUTER HEART MODELS

Simulated body surface potential maps (SBSPM) with isotropic and aniso tropic heart models were compared to investigate the effect of myocard ial anisotropy on body surface electrocardiograms at a whole heart lev el. Rotative fiber orientations of total 90 degrees was incorporated i nto an isotropic heart model. The anisotropy of conduction velocity an d intracellular electric conductivity was included in the simulation. SBSPM based on epicardial, intramural, and endocardial stimulation sho w high correlation with fiber orientations. On the other hand, the ani sotropy cannot be distinguished from the SBSPM in the simulation of no rmal heart model.