Tim Cook Shares Lifesaving Apple Watch Story After Teen Goes Into Kidney Failure

A recent study claimed that the Apple Watch can detect abnormal heart rhythms with 97 percent accuracy, and today Apple CEO Tim Cook shared a new story in which the company's wearable device did just that, saving someone's life in the process.

Speaking with Tampa, Florida's ABC affiliate WFTS, 18-year-old Deanna Recktenwald said that one day her Apple Watch warned her that her resting heart rate hit 190 beats per minute. After staff at a walk-in clinic confirmed a similar heart rate, Deanna was sent to the emergency room where doctors found that she was in kidney failure.

applewatchheartrate
Deanna's parents gifted her the Apple Watch for Christmas last year, with the family now thankful for its ability to alert them to a condition that might have otherwise continued to go unnoticed. "Now that we have some answers to why this is happening we can prevent something major from happening down the road," said Deanna.

Deanna's mother Stacey wrote to Apple, explaining what happened and thanking the company for the Apple Watch.

"After about an hour the blood work came back and the doctors reviewed the results and told us that Deanna was in Kidney Failure. Her kidneys were only functioning at 20%. She had no symptoms of any kidney issues or any other medical issues. If it wasn't for her Apple watch alarming her about her HR we wouldn't have discovered her kidney issue.

I honestly feel that your Apple Watch has saved my daughter's life. She is heading off for college in August and her condition may have been overlooked and if it wasn't caught now the doctor said she would have needed a kidney transplant. I am forever grateful to Apple for developing such an amazing lifesaving product. Now I can send her off to college and know that she can monitor her HR and seek attention if it alarms her again.

Tim Cook responded to Stacey in an email, and this morning tweeted about the event. "Stories like Deanna's inspire us to dream bigger and push harder every day," Cook's tweet reads. Apple has even teamed up with Stanford for its own study on whether the Apple Watch can detect abnormal heart rhythms and other common heart problems.

In addition to Cardiogram's study on abnormal heart rhythms, a study published by the company late last year reported that the Apple Watch may be able to accurately detect hypertension and sleep apnea. The study found that Cardiogram's deep neural network was able to recognize hypertension (aka high blood pressure) with 82 percent accuracy and sleep apnea with 90 percent accuracy. In 2018, Cardiogram's latest study suggested the Apple Watch can be used to detect the signs of diabetes.

Related Roundup: Apple Watch 11
Buyer's Guide: Apple Watch (Buy Now)

Popular Stories

iOS 26

iOS 26.2 Available Next Month With These 8 New Features

Tuesday November 11, 2025 9:48 am PST by
Apple released the first iOS 26.2 beta last week. The upcoming update includes a handful of new features and changes on the iPhone, including a new Liquid Glass slider for the Lock Screen's clock, offline lyrics in Apple Music, and more. In a recent press release, Apple confirmed that iOS 26.2 will be released to all users in December, but it did not provide a specific release date....
m1 chip slide

Five Years of Apple Silicon: M1 to M5 Performance Comparison

Monday November 10, 2025 1:08 pm PST by
Today marks the fifth anniversary of the Apple silicon chip that replaced Intel chips in Apple's Mac lineup. The first Apple silicon chip, the M1, was unveiled on November 10, 2020. The M1 debuted in the MacBook Air, Mac mini, and 13-inch MacBook Pro. The M1 chip was impressive when it launched, featuring the "world's fastest CPU core" and industry-leading performance per watt, and it's only ...
AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 2, AirPods Pro 3, and AirPods 4

Thursday November 13, 2025 11:35 am PST by
Apple today released new firmware designed for the AirPods Pro 3, the AirPods 4, and the prior-generation AirPods Pro 2. The AirPods Pro 3 firmware is 8B25, while the AirPods Pro 2 and AirPods 4 firmware is 8B21, all up from the prior 8A358 firmware released in October. There's no word on what's include in the updated firmware, but the AirPods Pro 2, AirPods 4 with ANC, and AirPods Pro 3...
iphone pocket%402x

Apple Debuts iPhone Pocket, a Limited Edition iPod Sock-Style Accessory

Tuesday November 11, 2025 1:23 am PST by
Apple has teamed up with Japanese fashion house ISSEY MIYAKE to launch iPhone Pocket, a 3D-knitted limited edition accessory designed to carry an iPhone, AirPods, and other everyday items. The accessory is like a stretchy pocket, not unlike an iPod Sock, but elongated to form a strap made of a ribbed, elastic textile that fully encloses an iPhone yet allows you to glimpse the display...
homepod mini colors

New HomePod Mini Coming Soon With These Features

Tuesday November 11, 2025 7:30 am PST by
Apple is expected to announce a new HomePod mini imminently, headlining with new chips. Here are all of the new features we're expecting. The second-generation HomePod mini is highly likely to contain a more up-to-date chip for more advanced computational audio and improved responsiveness. The current HomePod mini is equipped with the Apple Watch Series 5's S5 chip from 2019. Apple is likely ...
ios 26 digital id passport wallet

Apple Announces Launch of U.S. Passport Feature in iPhone's Wallet App

Wednesday November 12, 2025 9:15 am PST by
Apple today announced that iPhone users can now create a Digital ID in the Apple Wallet app based on information from their U.S. passport. To create and present a Digital ID based on a U.S. passport, you need: An iPhone 11 or later running iOS 26.1 or later, or an Apple Watch Series 6 or later running watchOS 26.1 or later Face ID or Touch ID and Bluetooth turned on An Apple Account ...
homepod mini thumb feature

New HomePod Mini, Apple TV, and AirTag Were Expected This Year — Where Are They?

Wednesday November 12, 2025 11:42 am PST by
While it was rumored that Apple planned to release new versions of the HomePod mini, Apple TV, and AirTag this year, it is no longer clear if that will still happen. Back in January, Bloomberg's Mark Gurman said Apple planned to release new HomePod mini and Apple TV models "toward the end of the year," while he at one point expected a new AirTag to launch "around the middle of 2025." Yet,...
Tesla Charging

Tesla Working to Add Apple CarPlay Support to Vehicles

Thursday November 13, 2025 8:31 am PST by
Tesla is working to add support for Apple CarPlay in its vehicles, Bloomberg's Mark Gurman reports. Tesla vehicles rely on its own infotainment software system, which integrates vehicle functions, navigation, music, web browsing, and more. The automaker has been an outlier in foregoing support for Apple CarPlay, which has otherwise become an industry standard feature, allowing users to...
CarPlay Pinned Messages

iOS 26.2 Adds New CarPlay Setting

Thursday November 13, 2025 6:48 am PST by
iOS 26 extended pinned conversations in the Messages app to CarPlay, for quick access to your most frequent chats. However, some drivers may prefer the classic view with a list of individual conversations only, and Apple now lets users choose. Apple released the second beta of iOS 26.2 this week, and it introduces a new CarPlay setting for turning off pinned conversations in the Messages...
iphone air thinness

iPhone Air Sales Are So Bad That Apple's Delaying the Next-Generation Version

Monday November 10, 2025 11:41 am PST by
The thin, light iPhone Air sold so poorly that Apple has decided to delay the launch of the next-generation iPhone Air that was scheduled to come out alongside the iPhone 18 Pro, reports The Information. Apple initially planned to release a new iPhone Air in fall 2026, but now that's not going to happen. Since the iPhone Air launched in September, there have been reports of poor sales...

Top Rated Comments

Braderunner Avatar
98 months ago
If your resting heart rate goes up to 190 bbm, you'll notice it, with or without the Apple Watch.
That is a blanket statement. You aren't a doctor. So, I'm not sure why you would even make that kind of statement.
...aaaah, this is the internet. The internet cares about your opinion.
Score: 12 Votes (Like | Disagree)
EmpyreanUK Avatar
98 months ago
Compare this to the garbled, scatter-gun mess that was demonstrated when the Apple Watch was first announced, and to me at least, it's clear that this is the real future of wearables.

If these passive health-monitoring functions can be refined and certified, then everyone in the world is going to want an Apple Watch or similar.
Score: 11 Votes (Like | Disagree)
npmacuser5 Avatar
98 months ago
If your resting heart rate goes up to 190 bbm, you'll notice it, with or without the Apple Watch.
Same happen to me, and No you may not notice it. Happens rather fast, not often, short timeframe like millisecond’s. The first thing you notice is a tapping on your wrist from the Apple Watch. Happens so fast that a standard clinic EKG misses the event. To verify my Apple Watch warning, EKG for 24 hours proved the Apple Watch was absolutely correct. Technology today, awesome.
Score: 10 Votes (Like | Disagree)
PickUrPoison Avatar
98 months ago
If your resting heart rate goes up to 190 bbm, you'll notice it, with or without the Apple Watch.
She didn’t notice it, but her Apple watch did.
Score: 9 Votes (Like | Disagree)
dannyyankou Avatar
98 months ago
If your resting heart rate goes up to 190 bbm, you'll notice it, with or without the Apple Watch.
Score: 7 Votes (Like | Disagree)
coolfactor Avatar
98 months ago
If your resting heart rate goes up to 190 bbm, you'll notice it, with or without the Apple Watch.
They may have felt something, but didn't know what it was. The Watch was able to tell her what was going on — her heart was beating abnormally fast. It's not a diagnosis, but as accurate, clear indicator that something is wrong.
Score: 6 Votes (Like | Disagree)