Skin contact impedance box plot using a six point description: minimum (black line), first quartile (blue line), mean (red cross), median (red line), third quartile (blue line), and maximum (black line). The left part of the plot - grey shaded area - shows the effect of the CA in 10 healthy volunteers. The median skin contact impedance values decreases from 2'151 Ohm in dry textile electrodes to 299 Ohm after applying the CA. The mean values decreases from 2'056 ± 464 Ohm to 325 ± 88 Ohm. Right part of the plot depicts the contact impedances measured in patients. During the 4 hours observation period in 40 male patients contact impedance increases slightly.