Also, the future update to the Apple Watch's ECG feature could address inconclusive readings for heart rates between 100 and 120 beats per minute.
The Heartline study, open to people aged 65 and older, will research atrial fibrillation and early detection of stroke using Apple's smartwatch.
The company wants to differentiate itself in an increasingly crowded market of Medicare Advantage plans through its focus on world-class technology.
The Cupertino-based company continues to assess the utility of the Apple Watch band as a location for medical sensors.
The best smartwatch in the world just got better with a slew of new features that will help Apple cement its position at the top of the market.
New capabilities include women cycle tracking, Noise app, Activity Trends and App Store right on the wrist; also, there are new watch faces.
Part of the watchOS 5.2 update, the ECG app can capture heart rhythm in a moment when users experience symptoms such as a rapid or skipped heart beat.
The number comes from a massive RAND Corporation study which included 400,000 participants across the US, Europe and South Africa.
Announced as one of key features of Apple Watch Series 4, the ECG functionality will be released by the end of the year as part of the next software update.
Clinical study utilizes the Zimmer Biomet mymobility app on Apple Watch and iPhone to guide patients through pre- and post-op care.