Last Updated on August 16, 2023 by pg@petergamma.org The AD8232 ECG module which is shown in the following picture is a single lead ECG device with 3 electrodes: But for cardiologists 3 lead ECG devices are gold standard for HR measurement as mentioned in this paper: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6732081/ An example for a 3 lead ECG device … Continue reading The iWorx TA-220 as an example of a 3 lead ECG gold standard device