Apple Working With Stanford to Determine If Apple Watch Can Detect Abnormal Heart Rhythms
Apple is planning to work with Stanford and telemedicine vendor American Well to determine whether the heart rate sensor in the Apple Watch can be used to detect abnormal heart rhythms and common heart conditions, reports CNBC.
An Apple Watch, if able to accurately detect arrhythmias, or abnormal heart patterns, could identify patients that are at a high risk of atrial fibrillation or similar conditions. Heart arrhythmias aren't always symptoms of a serious disease, but Apple Watch owners could find out about a problem from the Apple Watch and then get it checked out at a doctor if the device is determined to accurately predict heart problems.

"Atrial fibrillation is a common rhythm disorder and knowing someone has it is medically useful because those people might need specific treatments," said Bob Wachter, chair of the Department of Medicine at the University of California San Francisco.
A study conducted by the University of California, San Francisco and the team behind the Cardiogram app previously determined that the Apple Watch was able to detect abnormal heart rhythms with 97 percent accuracy. Apple could get even better results as it has access to raw data.
Just today, Apple CEO Tim Cook talked about Apple's health interests in an interview with Fortune. He said Apple is "extremely interested" in health, and that it represents a major business opportunity.
If you look at it, medical health activity is the largest or second-largest component of the economy, depending on which country in the world you're dealing with. And it hasn't been constructed in a way where the focus at the device level is making great products from a pure point of view. The focus has been on making products that can get reimbursed through the insurance companies, through Medicare, or through Medicaid. And so in some ways we bring a totally fresh view into this and say, 'Forget all of that. What will help people?'
Cook also said that Apple has been surprised to learn how the heart rate monitoring in the Apple Watch has already been helping people. Many people collect data with the Apple Watch, notice something amiss, and then go to the doctor to get it checked out. "A not-insignificant number have found out if they hadn't come into the doctor they would have died," said Cook.
Apple's study in partnership with American Well and Stanford is set to begin later this year, according to CNBC's sources.
Popular Stories
In select U.S. states, residents can add their driver's license or state ID to the Apple Wallet app on the iPhone and Apple Watch, and then use it to display proof of identity or age at select airports and businesses, and in select apps.
The feature is currently available in 13 U.S. states and Puerto Rico, and it is expected to launch in at least seven more in the future.
To set up the...
While the iPhone 18 Pro and iPhone 18 Pro Max are not expected to launch for another nine months, there are already plenty of rumors about the devices.
Below, we have recapped 12 features rumored for the iPhone 18 Pro models.
The same overall design is expected, with 6.3-inch and 6.9-inch display sizes, and a "plateau" housing three rear cameras
Under-screen Face ID
Front camera in...
Apple hasn't updated the Apple TV 4K since 2022, and 2025 was supposed to be the year that we got a refresh. There were rumors suggesting Apple would release the new Apple TV before the end of 2025, but it looks like that's not going to happen now.
Subscribe to the MacRumors YouTube channel for more videos.
Bloomberg's Mark Gurman said several times across 2024 and 2025 that Apple would...
2026 is almost upon us, and a new year is a good time to try out some new apps. We've rounded up 10 excellent Mac apps that are worth checking out.
Subscribe to the MacRumors YouTube channel for more videos.
Alt-Tab (Free) - Alt-Tab brings a Windows-style alt + tab thumbnail preview option to the Mac. You can see a full window preview of open apps and app windows.
One Thing (Free) -...
Earlier this month, Apple released iOS 26.2, following more than a month of beta testing. It is a big update, with many new features and changes for iPhones.
iOS 26.2 adds a Liquid Glass slider for the Lock Screen's clock, offline lyrics in Apple Music, and more. Below, we have highlighted a total of eight new features.
Liquid Glass Slider on Lock Screen
A new slider in the Lock...
Apple reportedly tested a version of the first-generation AirPods with bright, iPhone 5c-like colored charging cases.
The images, shared by the Apple leaker and prototype collector known as "Kosutami," claim to show first-generation AirPods prototypes with pink and yellow exterior casings. The interior of the charging case and the earbuds themselves remain white.
They seem close to some...
Apple's first foldable iPhone, rumored for release next year, may turn out to be smaller than most people imagine, if a recent report is anything to go by. According to The Information, the outer display on the book-style device will measure just 5.3 inches – that's smaller than the 5.4-inch screen on the iPhone mini, a line Apple discontinued in 2022 due to poor sales. The report has led ...
With the end of 2025 near, the time has come to look back at the devices and accessories that Apple discontinued throughout the year.
Most of the products that were discontinued this year were simply replaced by a new model with an updated chip. However, the iPhone SE line was entirely discontinued when the iPhone 16e launched, and the iPhone Plus line is being phased out.
Below, we have...
Samsung is working on a new foldable smartphone that's wider and shorter than the models that it's released before, according to Korean news site ETNews. The "Wide Fold" will compete with Apple's iPhone Fold that's set to launch in September 2026.
Samsung's existing Galaxy Z Fold7 display is 6.5 inches when closed, and 8 inches when open, with a 21:9 aspect ratio when folded and a 20:18...