Many smart devices today, both wearables like smartwatches and even smartphones, are equipped with sensors that not only track our physical activities but can also be used to measure things like heart rate or blood oxygen levels. More often than not, manufacturers advise people to always defer to a professional for medical advice and that these readings shouldn’t be taken at face value. In one exceptional case, however, such a wearable provided more useful data that helped save an elderly woman’s life when a traditional hospital ECG couldn’t.
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https://www.slashgear.com/apple-watch-detected-a-heart-condition-that-a-hospital-ecg-missed-04619088/
