ABSTRACT
ABSTRACT: Impedance cardiography (ICG) is a simple and cheap method to acquire hemodynamic parameters. In this work, the potential o f ICG to measure these parameters within a whole frequency spectrum has been analyzed using a simplified model of the humanthorax with a high temporal resolution. Therefore, a simulation has been conducted using the finite integration technique (FIT) with a temporal resolution of 103Hz. It has been shown that although neglecting other physiologic signal sources than the aorta, the results obtained from the simulations produce an ICG signal which correlates excellent with measured ICG signals. In addition, real and imaginary part of the impedance show a similar behaviour over time and reveal cole-cole curves known from bioimpedance spectroscopy. What is more, the maximum temporal derivative of the impedance changes with frequency which is one of the reasons for inconsistency between obtained results from different ICG devices.
