A 42-year-old man from New Jersey recently showed up in an emergency ward following a seizure. After looking at the data collected by his Fitbit Charge HR, the doctors decided to reset his heart rate with an electrical cardioversion. It’s the first time in history that a fitness tracker was used in this way.
http://gizmodo.com/this-dudes-fitness-tracker-may-have-just-saved-his-life-1769604325