Great project, Scott. Expecially the software. Though, I would encourage you and anyone is interested in realizing your project to provide an optical coupling between the output of the circuit and the input of the soundcard. it's not given that a leakage in the psu of your pc can reach your chest.
Greetings
Regarding https://swharden.com/blog/2016-08-08-diy-ecg-with-1-op-amp/
Great project, Scott. Expecially the software. Though, I would encourage you and anyone is interested in realizing your project to provide an optical coupling between the output of the circuit and the input of the soundcard. it's not given that a leakage in the psu of your pc can reach your chest. Greetings