Apple Watch 4’s ECG and AFib feature on WatchOS 5.1.2 saved a life, just a day after launch

Apple Watch 4's ECG and AFib feature saves a life

Apple Watch 4 launched in September. But, one of the best features of the $399 smartwatch is definitely the ECG and AFib notification feature. Though, it’s been a few months now, Apple launched the ECG feature with WatchOS 5.1.2 on 6th December. Only a day after it’s launch, Apple Watch 4’s ECG and AFib notification feature saved a Redditor’s life.

The premium watch was in news recently after the WatchOS 5.1 update bricked many Watch 4 units. Apple Watch 4 is the first device to be FDA certified ECG device for consumer use.

Apple Watch 4’s ECG and AFib Notification feature is life saving: A real story

A Redditor, edentel took it to Reddit to tell how Apple Watch 4 might have saved his life. Here’s the story as said by him:-

Ok holy hell…. strap in.

If you have the Apple Watch 4 please please update to the new firmware released yesterday and take your ECG.

I did last night and tried it out. Weird. Abnormal heat rate notifications. Ran the ECG app and came back afib. Well…glitchy firmware. Let’s try again. Afib. Again and again and again. Piece of crap watch.

My wife wakes up and I put it on her. Normal. Normal. Me afib. Try the other wrist, try the underside of the wrist. Every time afib warning.

Ok. So go to Patient First. Parking lot full and I’m going to blow it off and head home. Look at the watch again, afib again.

Fine walk in and sign in. They ask what’s wrong and I’m embarrassed. ‘Ok so there is a new watch feature….hahaha….I’m silly but can we check this?”

I did not know that this comment was a quick queue pass for Patient First. I’m taken right back and hooked up. The technician looks at the screen and says “I’m going to get the doctor”

Doctor comes in, looks at the screen, looks at me and says “You should buy Apple stock. This probably saved you. I read about this last night and thought we would see an upswing this week. I didn’t expect it first thing this morning.”

Soooo long story short, heading to a cardiologist right now.

Test yourself. I didn’t have a clue. I may not ever have.

The Story explained

For those of you who don’t understand, here is a simpler to understand version. edentel got the ECG feature on his watch after the WatchOS 5.1.2 update. And, he decided to try it on. The Watch warned him of possible signs of an Atrial Fibrillation (AFib). If you want, you can learn more about the ECG feature on Apple Watch 4 and it’s working mechanism.

Anyways, even after running the ECG multiple times, the watch gave the same warning each time. Still, edentel thought it was nothing serious and was some error with his expensive Apple Watch Series 4.

Just to check, his wife tried it on and the ECG said normal. He tried the underside of his wrist and ran the app again. Alas! The watch warned him of an AFib. He, then decided to go the hospital. Though he was embarrassed to tell them that his Watch had scared him, he was very grateful when the Doctor confirmed the diagnosis.

He actually had an abnormal heart rhythm and the Doctor said that his Apple Watch 4 might have saved his life.

Apple Watch 4 ECG vs Normal ECG

edentel also shared the image of the Apple Watch 4 ECG and the ECG he took at the hospital. Here they are:-

Apple Watch ECG showing AFib pattern with warning
Apple Watch ECG showing AFib pattern
Normal ECG showing AFib pattern
Normal ECG showing AFib pattern


There have been lots of controversies regarding Apple Watch 4’s FDA approval and the ECG’s efficiency. But, only a single day into the launch of the feature, the watch has shown what it’s capable of. We’ll keep you updated on this.

Comments 1


    It s because it s a medical device that requires approval from the government. Blame your government, not Apple.


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