A similar setup which we have discussed on the previous page: has already been implemented by g.tec medical engineering, and was used in a PLOS One paper which validated the accuracy of the Polar OH1 sensor: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0217288 And is shown in the following picture (reprint from the above PLOS ONE paper): ECG leads and Polar …