Peter Gamma from www.petergamma.org is very interested in ECG devices. He has written 525 pages about it on his site: https://petergamma.org/category/ecg-devices The best paper he could find about this topic in the web is from Canadian scientists published in Helyon: https://www.cell.com/heliyon/pdf/S2405-8440(21)01251-2.pdf Helyon is not „the Journal of Physiology“, but it is at least, www.cell.com. And …