watchOS 5.2 brings ECG functionality to Apple Watch Series 4 in Europe and Hong Kong

Apple Watch ECG

Back in December last year Apple rolled out watchOS 5.1.2 update to Apple Watch Series 4 bringing an ECG app that lets customers take an electrocardiogram right from their wrist, capturing heart rhythm in a moment when they experience symptoms like a rapid or skipped heart beat and helping to provide critical data to physicians.

This feature is now available for users in 19 European countries, including , including Austria, Belgium, Denmark, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Romania, Spain, Sweden, Switzerland, and the UK, as well as Hong Kong with the latest watchOS 5.2 update.


  • New electrodes built into the back crystal and Digital Crown on Apple Watch Series 4 work together with the ECG app to enable customers to take an ECG similar to a single-lead reading.
  • To take an ECG recording at any time or following an irregular rhythm notification, users launch the new ECG app on Apple Watch Series 4 and hold their finger on the Digital Crown.
  • As the user touches the Digital Crown, the circuit is completed and electrical signals across their heart are measured.
  • After 30 seconds, the heart rhythm is classified as either AFib, sinus rhythm or inconclusive. A
  • ll recordings, their associated classifications and any noted symptoms are stored securely in the Health app on iPhone.
  • Users can share a PDF of the results with physicians.

Apple Watch Series 1 or later get the irregular rhythm notification feature using the optical heart sensor that will occasionally check the user’s heart rhythm in the background for signs of an irregular heart rhythm that appears to be AFib and alerts the user with a notification if an irregular rhythm is detected on five rhythm checks over a minimum of 65 minutes.

Author: Srivatsan Sridhar

Srivatsan Sridhar is a Mobile Technology Enthusiast who is passionate about Mobile phones and Mobile apps. He uses the phones he reviews as his main phone. You can follow him on Twitter and Instagram