Apple Watch's EKG app only works if your heart rate is between 50 and 120bpm. see https://support.apple.com/en-us/HT208955 https://support.apple.com/en-us/HT208

Apple Watch's EKG app only works if your heart rate is between 50 and 120bpm. see https://support.apple.com/en-us/HT208955 https://support.apple.com/en-us/HT208955. Recent theVerge.com article says the Apple Watch is sending too many people to doctors for further investigation (only ~10% had actual cardiac problems). see https://www.theverge.com/2020/10/1/21496813/apple-watch-heart-monitor-ekg-false-positive https://www.theverge.com/2020/10/1/21496813/apple-watch-hear... Also the main new feature of the Apple Watch 6, blood oxygen monitoring, was reported as unreliable in theVerge.com review: https://www.theverge.com/21496141/apple-watch-series-6-review-blood-oxygen-monitor-watchos-7 https://www.theverge.com/21496141/apple-watch-series-6-revie... and a Washington Post article put down the Apple Watch and the FitBit Sense's blood oxygen monitors: https://www.washingtonpost.com/technology/2020/09/23/apple-watch-oximeter/ https://www.washingtonpost.com/technology/2020/09/23/apple-w...