https://www.youtube.com/playlist?list=PLYojB5NEEakXhL1WoDvNPm1cG57pjE0d7
https://www.youtube.com/playlist?list=PLt1W8-bXvCf5HAwaaw2VzDnWHxBtBZcqR
https://www.youtube.com/playlist?list=PL2oVjKTYocdPMaNwn4xbg6xAIaAnyraMj
<aside> 💡 Further reading
</aside>
https://litfl.com/ecg-library/
https://en.ecgpedia.org/index.php?title=Main_Page