Tim Cook shared a story on Twitter, describing how an Apple Watch user potentially had his life saved when his wearable device warned of an irregular heartbeat.
Elissa Lombardo, who alerted Cook of the incident, said that her husband had owned his Apple Watch for just a couple of days before he was sent the alert. The Apple Watch revealed signs of atrial fibrillation and an elevated heart rate of 150 beats per minute — compared to a normal resting heart rate of 60 to 100bmp.