Numerical simulations of electrograms in the left ventricular wall

This paper addresses the numerical simulations of electrograms in an anisotropic model of the left ventricle. To accurately compute electrograms (EGs), inside or outside the myocardial wall, a special numerical technique is taken into account. The EGs were compared with those directly recorded from isolated dog hearts immersed in a conducting medium during ventricular excitation and epicardial stimulation. The same multiphasic structure was observed for the recorded and simulated EGs. The typical EG morphology was studied considering a splitting of the EGs into an axial and a conormal component and taking into account the effect of a drift component associated to the reference potential.