My ecg doesn’t work

When the countdown starts, then suddenly stops, do you get any message on the watch face?

Perhaps "hold your hands steady" or "keep finger on the crown"?

The electrical signal measured by the watch is minuscule, in the order of 1-2 millivolts, so any interference from skin lotions, dirty sensors on the back or the Digital Crown, or band worn too loosely can effect the results.

Thanks for asking about these features on Apple Watch.

Make sure you're on the latest version of iOS and watchOS supported by your devices.

Check here to see if a feature is available in your region.

Here are some additional resources you might find helpful:

Heart health notifications on your Apple Watch

Take an ECG with the ECG app on Apple Watch

Track your AFib History with Apple Watch

If you have any other questions, please contact our team here.

If you believe that you're experiencing a medical emergency, please contact your local emergency services.

I'm sorry you're still experiencing difficulties.

Perhaps your next step would be to do as suggested by the Community Specialist lail_

earlier in this thread and contact Apple Support - here

Good luck and please let us know if you were able to solve your problem

👍