Several smartwatches claim to be able to detect atrial fibrillation in wearers. But how accurate are they?
That was the focus of an October meta-analysis in JACC: Advances that reviewed 28 studies spanning 17,349 patients. Here is where the devices ranked for accuracy:
Sensitivity
1. Amazfit: 99%
2. Seiko Epson PWM: 98%
3 (tie). Garmin Forerunner: 97%
3 (tie). Samsung: 97%
5. Apple Watch: 94%
6. Withings ScanWatch: 89%
7. Fitbit: 66%
Specificity
1. Amazfit: 99%
2. Garmin Forerunner: 98%
3. Apple Watch: 97%
4. Samsung: 96%
5. Withings ScanWatch: 95%
6. Seiko Epson PWM: 91%
7. Fitbit: 79%
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