A triathlon runner named Connor underwent open-heart surgery after an ECG reading from his Apple Watch led doctors to investigate an underlying congenital heart condition. Connor had noticed his heart rate reaching about 219 beats per minute during a triathlon. The ECG showed signs of atrial fibrillation, prompting further medical checks. Apple has now featured his experience in a YouTube video as part of its series highlighting user experiences with Apple Watch health and safety features, including ECG and Fall Detection.
