A-fib--a Rapid, Irregular Heartbeat--Can Kill You, but New Tech Can Spot It
A fluttering heartbeat called A-fib can lead to stroke, but smartwatches can detect it, and there are good treatments
![A-fib--a Rapid, Irregular Heartbeat--Can Kill You, but New Tech Can Spot It](https://static.scientificamerican.com/sciam/cache/file/D3CF3C39-9586-4604-B4B666186624F60D_source.jpg?#)
A fluttering heartbeat called A-fib can lead to stroke, but smartwatches can detect it, and there are good treatments
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