One of the outstanding features of the Apple Watch Series 4 is the ability to perform an ECG (Electrocardiogram). It's the first consumer product to do this, but the feature was initially unavailable. Today it is.
The purpose of the ECG function is "to capture the rhythm of the heart at a time when symptoms such as a fast or frenetic heartbeat occur, and help provide critical data to physicians," potentially saving lives
Although the ECG function applies only to Series 4, all Apple watches can detect irregular heartbeats and inform the user that something is wrong with Update 5.1.2. This in turn could save lives as it can help users identify problems before they get serious.
RELATED: What is an ECG and how does it work on the new Apple Watch?
All ECG information is securely stored in the health app so you can easily share it with your doctor while the irregular heart rhythm feature is displayed on the watch only. Watch User.