“My watch saved my life.”

Liam — not his real name — is a 75-year-old retired teacher in Boston. Two years ago, his son-in-law gave him an Apple Watch. Soon after, it began flagging something strange: possible atrial fibrillation.

His cardiologist glanced at the alerts Liam presented, referred to an older EKG, and dismissed the idea.

Back home, the irregular rhythms continued. A week later, feeling worse, Liam called his nurse practitioner, who told him to get to the emergency department immediately. There, doctors confirmed “a bad case” of Afib and shocked his heart back into a normal rhythm.

“The watch caught it earlier than the doctors,” Liam says.

I include his story in my new book “ Dr. Bot ” because it captures an emerging truth we can’t afford to ignore: Health care is alread

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