Impedance cardiography (ICG)
is a noninvasive technology measuring total electrical conductivity
of the thorax and its changes in time to process continuously a
number of cardiodynamic parameters, such as Stroke Volume, SV,
Heart Rate, HR, Cardiac Output, CO, Ventricular Ejection Time, VET,
Pre-ejection Period and used to detect the impedance changes caused
by a high-frequency, low magnitude current flowing through the
thorax between additional two pairs of electrodes located outside
of the measured segment. The sensing electrodes also detect the ECG
signal, which is used as a timing clock of the system
