A case is reported in which life can be saved by the electrocardiogram function of just released Apple Watch

On 7th December 2018, Apple released " watchOS 5.1.2 " which is the latest version of OS for Apple Watch. The biggest feature of watchOS 5.1.2 was the release of "electrocardiogram (ECG)" application, but it is talked about immediately that this electrocardiogram application saved the life of Apple Watch user.

Apple Watch user discovers A-fib heart issue with new ECG app, 'this probably saved you,' says doctor - 9to5Mac
https://9to5mac.com/2018/12/07/apple-watch-ecg-saves-life/

Since watchOS 5.1.2 delivered on December 7, 2018, the electrocardiogram application became available in Apple Watch Series 4 . This is the function announced as of September 2018 when Apple Watch Series 4 was announced, which is finally available by updating the OS.

This electrocardiogram application is distributed only in the US and the US territory at the time of article creation, but we report that one of the users who used the electrocardiogram application was saved lives at once.

Reddit user edentel said that when using the delivered electrocardiogram application, the result that herself is an atrial fibrillation that is a heart disease appears to be displayed. Of course, there is a good chance that Apple Watch will display the wrong result, so edentel seems to have used the electrocardiography application more than once, but he said that the application has issued a notice of atrial fibrillation over and over again .

Heading to a cardiologist .....: AppleWatch
https://www.reddit.com/r/AppleWatch/comments/a40qm5/heading_to_a_cardiologist /

Still, edentel who could not believe the notice "atrial fibrillation" was said that he used his electrocardiography application for his own wife. Although I confirmed it more than once, my wife indicated only normal results, so Edentel finally decides to head to the hospital.

In a hospital edentel explained that "Apple Watch shows that he is an atrial fibrillation," and after conducting a close examination, he also seems to have been diagnosed with atrial fibrillation again. The doctor at the hospital said, "Apple Watch probably saved your life, I saw this news (delivery of the electrocardiogram application) last night and I thought that the number of patients will increase next week, but the day after that I did not expect to expect such patients to come in the morning, "he told edentel. In addition, the ECG application of Apple Watch Series 4 periodically checks the user's heart throughout the day and displays an alert when a heart rate higher than usual or a low heart rate is detected and informs the user of the danger.

Electronic electrocardiogram of edentel recorded by Apple Watch

The electrocardiogram application is a function to more accurately measure the heart rate of the user, but it is surprising that it immediately detected atrial fibrillation immediately after it was released and succeeded in informing the user of the crisis of life.