Apple Watch’s ECG sensor can be used to predict stress
Surprisingly, the single-lead ECG on the Apple Watch compares favorably to the 12-lead ECG used by hospitals. Apple says: “The ECG app’s ability to accurately classify an ECG recording into atrial fibrillation and sinus rhythm was tested in a clinical trial of approximately 600 subjects and demonstrated 99.6% specificity for ECG classification.” sinus rhythm and a sensitivity of 98.3% for the classification of atrial fibrillation for the classifiable results”.
Survey shows ECG on Apple Watch could be used to predict stress
A recent study, the first of its kind, was conducted to see how well the ECG sensor in the Apple Watch can measure stress. Participants in the study were given an iPhone 7 with iOS 15 installed and an Apple Watch Series 6 (which has the ECG sensor and watchOS 8.3 installed). The participants received the devices for two weeks and were told to collect data six times a day, every three hours.
The researchers wrote: “In general, the ‘stress’ models had a high level of accuracy but lower recall. The ‘no stress’ models performed well overall, with recall typically greater than 60%. Taking duration into account The ultrashort duration of the ECG measurements performed here compared to the standard, as well as the nature of the real-life measurements, the results presented were quite promising.”
Many wearables offer stress monitoring, even the low-priced Xiaomi Smart Band 7
The researchers also believe that the ECG sensor in the Apple Watch, combined with the watch’s sleep monitoring feature and its ability to track physical activity, could become an accurate tool for predicting higher levels of stress. And Apple Watch users could be notified of an impending increase in their stress levels so they can get help as soon as possible before their mental health deteriorates further.
The woman was taken to the nearest emergency room where she underwent surgery. Her son said: “The NHS (National Health Service) specialists who treated her said that if it weren’t for the Apple Watch, it is very likely that she would not have survived the rest of the day.”