Support for the two features come by way of the watchOS 5.1.2 update. Access to an EKG app is done through the feature’s own app installed on the watch; simply activate the app, and place your finger on the crown (i.e. the dial) for 30 seconds. The app should then start reading your heart rhythm and start making notes of your heart beat, recording it all down into the Apple Health app on your iPhone. The irregular heart monitor, unlike the EKG reader, doesn’t require any form of activation. It’s a passive feature that checks your heart rhythm in two-hour intervals. If the feature detects five abnormal readings consecutively, the feature will prompt you about your condition and suggest that you visit a doctor as soon as possible.
As helpful as these features are, Apple has made it clear that they are in no way, replacements for actual medical personnel. According to The Verge, Apple had told the online news site that you will need to go through a long list of legal wrangle before you can actually gain access to them. (Source: The Verge)
