Modeling of Electromagnetic Heating Effects During in vivo Testing of Prosthetic Heart Valves

In this paper, a numerical model is presented to investigate inductive heating during in vivo testing of prosthetic heart valves using electromagnetic acoustic transduction (EMAT) methods. The maximum temperature rise on the surface of the heart valve ring is calculated by solving the bioheat equation. The cooling effect of the blood flow is incorporated by imposing appropriate interface conditions. We show that the maximum temperature rise can be controlled to comply with applicable safety standards both by regulating the duty cycle of the tone-burst excitation signal and synchronizing the excitation with the cardiac cycle appropriately