Apple Watch Can Detect Atrial Fibrillation With 97% Accuracy With Cardiogram App

Posted: May 12 2017, 5:39am CDT | by , in News | Apple

Apple Watch Can Detect Atrial Fibrillation with 97% Accuracy with Cardiogram App

App makes the Apple Watch a legitimate medical monitoring device for heart issues

A new study that was conducted at the University of California, San Francisco has proven that the Apple Watch has legitimate and very accurate abnormal heart rate detection capabilities. The study was done in conjunction with the team who created the Cardiogram app reports MacRumors.

The study found that the integrated heart rate monitor inside the Apple Watch is 97% accurate in detecting atrial fibrillation, which is the most common form of an abnormal heart rate, when it was paired with a special algorithm to sort through the data collected by the sensor. The study used 6,158 participants and all of them used the Cardiogram app on the Apple Watch to monitor heart rates.

Most of those participants were known to have a normal heart rate, but sprinkled in the study were 200 people with paroxysmal atrial fibrillation. That is a medical term for an occasional irregular heart rate. The data recorded in the study along with data from the normal users of the app was then used to construct a neural network that was able to recognize abnormal heart rhythms with nothing more than the data collected by the Apple Watch heart rate sensor. The folks behind the Cardiogram app say that the new algorithm is almost always successful when determining if a user is having afib.

"In order to validate the model, we obtained gold-standard labels of atrial fibrillation from cardioversions. In a cardioversion, a patient experiencing atrial fibrillation is converted back to normal sinus rhythm, either chemically or with a shock to the heart. 51 patients at UCSF agreed to wear an Apple Watch during their cardioversion."

"We obtained heart rate samples before the procedure, when the patient was in atrial fibrillation, and after, when patient's heart was restored to a normal rhythm. On this validation set, our model performed with an AUC of 0.97, beating existing methods."

Cardiogram is a startup and will continue to work on the algorithm more. The company says it needs to test more so it can determine if the algorithm it has created works in different conditions and then scale that algorithm for continuous use by all Cardiogram users. The app is a free downalod and is on the App Store now.

This story may contain affiliate links.


Find rare products online! Get the free Tracker App now.

Download the free Tracker app now to get in-stock alerts on Pomsies, Oculus Go, SNES Classic and more.

Latest News


The Author

<a href="/latest_stories/all/all/3" rel="author">Shane McGlaun</a>
Tech and Car expert Shane McGlaun (Google) reports about what's new in these two sectors. His extensive experience in testing cars, computer hardware and consumer electronics enable him to effectively qualify new products and trends. If you want us review your product, please contact Shane.
Shane can be contacted directly at




comments powered by Disqus