The first digital health technology qualified under the MDDT program, providing a non-invasive way to check estimates of atrial fibrillation (AFib) burden within clinical studies.
The Afib History feature checks pulse rate data collected by the Apple Watch’s photoplethysmography (PPG) sensor to spot irregular heart rhythms linked to AFib. It then gives users a retrospective estimate of their AFib burden, indicating how much time they have spent in AFib during previous periods of wearing the Apple Watch.
Image Credit–Apple
How it works? The Apple Watch’s PPG sensor uses green LEDs and light-sensitive photodiodes to track changes in the amount of blood flowing through your wrist at any moment. When your heart beats, it sends a pressure wave through your blood vessels, causing a quick bump in blood volume as it passes by the sensor.
If you have been diagnosed with AFib, own an Apple Watch, and want to use this feature, just follow these steps:
- Grab your iPhone and open up the Health app.
- Tap on Browse, then tap Heart.
- Look for AFib History and give it a tap.
- Hit Set Up, then tap Get Started.
- Enter your Date of Birth.
- When it asks if you have been diagnosed with AFib by a doctor, just say yes and hit Continue.
- Keep tapping Continue to get more info on AFib History, the kind of results you might see, and other lifestyle factors.
- And that is it! Tap Done to finish up.
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