Apple shares a new “true story” in which a triathlete, Connor, says his Apple Watch alerted him to a potential serious heart issue while he was training. The company says he noticed a very fast heart rate during training and used the Apple Watch’s ECG app, which detected signs consistent with atrial fibrillation. He later received medical evaluation and treatment.

Apple reports that doctors found Connor had a congenital heart condition. The account says this condition led to open-heart surgery, and that the early warning from the watch helped set him on the path to care. MacRumors and AppleInsider both describe the story as part of Apple’s occasional series of survivor testimonials published on its YouTube channel.

The outlets focus primarily on Apple’s framing of the event: a health-alerting moment linked to the Apple Watch ECG app. Both also reference that the ECG capability is available on certain Apple Watch models, while noting its absence on Apple Watch SE.