From the article:
Luckily, the doctors also noticed the man was wearing a Fitbit. When they checked the synchronized app on the patient's smartphone they were able to see his heart rate activity. That data then showed doctors that the atrial fibrillation was caused by the seizure, meaning they could perform the electrocardioversion that saved his life.http://www.komando.com/happening-now/355001/this-simple-gadget-saved-a-mans-life-if-you-dont-have-one-get-one
Very interesting. I don't suspect I'll rush out and by at Fitbit, but, still, very interesting.