Make sure that your Apple Watch is snug and on the wrist that youselected in the Apple Watch app. To check, open the Apple Watch app, tap the My Watch tab, then go to General > Watch Orientation.
Open the ECG app on your Apple Watch.
Rest your arms on a table or in your lap.
With the hand opposite your watch, hold your finger on the DigitalCrown. You don't need to press the Digital Crown during the session.
Wait. The recording takes 30 seconds. At the end of the recording, you will receive a classification, then you can tap Add Symptoms andchoose your symptoms.
Tap Save to note any symptoms, then tap Done.