As promised Apple have released a new version of watchOS supporting their new ECG feature.
Currently the ECG app is only available in United States, Puerto Rico, Guam, and the U.S. Virgin Islands.
The ECG app can record your heartbeat and rhythm using the electrical heart sensor on Apple Watch Series 4 and then check the recording for atrial fibrillation (AFib), a form of irregular rhythm.
May already have saved lives!
A user on reddit have an interesting story to tell. He was going to try out the new app and the results came back as AFib. Thinking this was only a glitch he tried several times, and on both arms. Still AFib.
When his wife woke up he tried on her arm, thinking the watch had an error somehow. Her readings came back Normal.
So he went to the doctor to get it checked by professionals and sure enough AFib was the results there as well. Doctor telling him this may have saved his life.
This is not the only story about Apple Watch contributing to saving lives. Just make sure to not blindly trust the technology, but go to the doctor if you get irregular readings from your watch.