Photo: Getty Images
A 70-year-old Tucson woman named Yolie De Leon felt a fluttering in her chest before she was about to take a walk back in June. De Leon, who was wearing an Apple Watch that day, told Fox News she glanced down at her wrist and saw a glaring message to seek medical attention. She explained, "It said my heart rate was at 174. It said, 'You are in AFib,' and said, 'Call your doctor immediately.'" De Leon went to her local hospital and after a number of tests was told her condition was "life-threatening" and that her Apple Watch had been right. She was hospitalized for one week