Calculation of the induced voltage at the terminals of cardiac pacemakers submitted to conducted disturbances.

This paper presents a method of numerical simulation based on the admittance method which allows us to calculate the induced tension at the terminals of a cardiac pacemaker subjected to conducted disturbances. The physical model used for simulation is an experimental test bed that makes it possible to study in vitro the behavior of pacemakers subjected to electromagnetic disturbances. The studied frequencies correspond to domestic and industrial applications of electricity (50 Hz-500 kHz). The experimental tests are carried out with two different single-chamber pacemakers implanted in a tissue-equivalent phantom and correlated to tests performed in air (without the phantom). Results obtained by numerical simulation are in good agreement with experimental values and that allows us to validate the computer model. Numerical results are used to determine the transfer function between the signal source and the signal induced between the distal lead tip and the case of the implanted device.