https://www.techradar.com/news/the-doctor-on-your-wrist-how-wearables-are-revolutionizing-healthcare > If it weren’t for her smartwatch, 18-year-old Deanna Recktenwald might not be alive today. Her watch pinged to warn her that her resting heart rate was rocketing, and she immediately went to get checked out; if she hadn’t, she might have died from kidney failure. > Sarah-Jayne McIntosh had a similarly narrow escape. Her Fitbit warned her that her heart rate was three times normal; as she told The Mirror: “The doctors said that if I hadn't phoned for an ambulance when I did, and if I wasn't wearing my Fitbit to track my heart rate, I could have suffered a heart attack/cardiac arrest and could have died.”