Tim Cook Tweets Story of User's Apple Watch Detecting Atrial Fibrillation
Apple CEO Tim Cook today shared a story on Twitter of an Apple Watch that alerted its user to atrial fibrillation, potentially saving their life in the process.

Elissa Lombardo tweeted Cook with her husband's experience with Apple Watch that occurred just two days after he started wearing the device.
The smartwatch's ECG feature detected the case of A-Fib during an elevated heart rate, which led her husband to seek medical attention.
Medical professionals apparently discovered a "major blockage" in his arteries but were able to correct the problem, and two days later he was feeling fine again.
According to Lombardo, her husband presented with similar symptoms in the past, but on those occasions he never visited the emergency room to get them checked out.
This isn't the first time an Apple Watch has potentially saved someone's life. When the ECG feature launched in December in the U.S.,
TIME published a story about a 46-year-old Texas resident who was having trouble breathing normally.
Fortunately, since he was wearing an Apple Watch and participating in the recent Apple Heart Study, he was alerted to signs of an irregular heartbeat and went to the emergency room.
At the hospital, doctors hooked him up to an ECG machine and found signs of atrial fibrillation, an irregular heartbeat that can lead to stroke and other potentially fatal complications. He spent the next few days in the hospital while doctors returned him to a normal sinus heart rhythm.
Popular Stories
The iPhone 17 Pro and iPhone 17 Pro Max are three months away, and there are plenty of rumors about the devices.
Below, we recap key changes rumored for the iPhone 17 Pro models as of June 2025:Aluminum frame: iPhone 17 Pro models are rumored to have an aluminum frame, whereas the iPhone 15 Pro and iPhone 16 Pro models have a titanium frame, and the iPhone X through iPhone 14 Pro have a...
Apple will finally deliver the Apple Watch Ultra 3 sometime this year, according to analyst Jeff Pu of GF Securities Hong Kong (via @jukanlosreve).
The analyst expects both the Apple Watch Series 11 and Apple Watch Ultra 3 to arrive this year (likely alongside the new iPhone 17 lineup, if previous launches are anything to go by), according to his latest product roadmap shared with...
The Apple Watch Ultra 3 is expected to launch later this year, arriving two years after the previous model with a series of improvements.
While no noticeable design changes are expected for the third generation since the company tends to stick with the same Apple Watch design through three generations before changing it, there are a series of internal upgrades on the way.
By the time the ...
Apple's Terminal app is getting a visual refresh in macOS Tahoe, and it's the first notable design update since the command-line tool debuted.
The updated Terminal will support 24-bit color and Powerline fonts, according to Apple's State of the Platforms presentation at WWDC25. The app will also adopt the new Liquid Glass aesthetic with redesigned themes that align with macOS 26's broader...
Apple this week revealed that iOS 26 is compatible with the iPhone 11 series and newer.
That means that iOS 18 is the end of the road for the iPhone XS, iPhone XS Max, and iPhone XR, which were all released in 2018. However, those devices will continue to receive security updates for at least a few more years.
iOS 26 is compatible with the following iPhone models:
iPhone 16e
iPhone...
With iOS 26, Apple has made some additions to the iPhone Lock Screen that aim to make it more customizable than ever.
Of course, things can always change before the software makes its way to the general iPhone-owning public, but here are five new things iOS 26 can do on the Lock Screen as of the current developer beta.
Widgets Top or Bottom
In iOS 18, the row of widgets on your Lock...
Apple may launch the AirPods Pro 3 in 2026, according to analyst Jeff Pu of GF Securities Hong Kong, contradicting earlier predictions of a much sooner release.
Pu's Apple product timeline (via @jukanlosreve) comes as a bit of a surprise. Bloomberg's Mark Gurman said in February that new AirPods with heart rate monitoring were "months away," suggesting a late 2025 launch at the earliest....