Different ECG readings on different watches.
When measuring ECG on my Apple Watch 4 I have Atrial Fib yellow warning. When measuring ECG on my wife’s Apple Watch 4, I have reading of sinus rhythm. Why is that ?
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Thank you for participating in the Apple Support Communities.
If you feel you have a medical emergency then call for medical help.
Apple Watch should not be regarded as a medical device.
It is possible that one of the Watches is in need of service - without a third watch it is not possible to suggest which.
I want to make sure you reach the right team for help with your iphone. I recommend that you stop using the device and contact Apple Support directly. Depending on your region, you may be able to reach them here
Click here > Contact - Official Apple Support
or phone numbers
Click here > https://support.apple.com/en-us/HT20123