Even as the Apple Watch Series 6 approaches launch, a landmark study highlights its potential as a vital health tool beyond fitness tracking.
As reported by Reuters on November 14, 2019, the Apple Watch can identify atrial fibrillation—the most common irregular heartbeat in the United States.
Published in the New England Journal of Medicine, the Apple Heart Study by Stanford University researchers utilized earlier Apple Watch models, predating the ECG sensor in newer versions.
Over more than 400,000 participants were monitored for eight months via a dedicated app. The watches flagged irregular pulses in 0.5% of users, with ECG patches confirming atrial fibrillation in 34% of those cases. Co-author Dr. Mintu Turakhia, a cardiologist, views these results as encouraging.
The study validated the Apple Watch's heart rate sensor and algorithm. Dr. Daniel Cantillon, a Cleveland Clinic cardiologist not involved, praises the technology's promise but notes over half the participants were under 40—a low-risk group for atrial fibrillation.
Dr. Edward W. Campion, editor of the New England Journal of Medicine, raised concerns in an editorial about participant bias, as all owned an Apple Watch and iPhone, aligning them with the sponsor.
While innovative, the tech isn't without debate: Does it prioritize identifying the ill or alerting the healthy unnecessarily? Some healthy users received alerts, while others with issues went unnoticed.
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