CHEST CONDUCTION PROPERTIES AND ECG EQUALIZATION

The final aim in the detection and recording of any biomedical signal is to obtain a faithful reconstruction of the "original" activity of human organs. It is often implicitly assumed that the signal propagation is frequency and voltage independent and, therefore, possible signal distortions and non linearities are neglected. It should be considered, indeed, that organs such as he,art and brain, are immersed in a medium macroscopically inhomogeneous and, somehow, anisotropic (e.g. bones, bloody vessels, air, etc . ) The problem of reconstructing the "true" electrical activity is made even more complex by an inaccurate knowledge of dielectric properties at boundaries (e.g. skin-conducting gel-electrodes). [...]