CES 2020: Withings ScanWatch will feature ECG and sleep apnea detection | ZDNET
ECG smartwatches explained: How they work and the best on the market - Wareable
More evidence that smartwatches can detect and predict heart issues
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Fitness smartwatches with ECG: comparison, review and market overview - Fitness Gadgets
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Withings ScanWatch Review: An Elegant Health and Fitness-Tracking Wearable | WIRED