How to Take an ECG on Your Apple Watch Series 4 (and Why You'd Want To)

How to Take an ECG on Your Apple Watch Series 4 (and Why You'd Want To)https://www.tomsguide.com/us/apple-watch-4-ecg-app-how-to,review-5990.html
https://www.worlds50.com/2018/12/how-to-take-ecg-on-your-apple-watch.html