The study suggests the Apple Watch can detect an irregular heartbeat, at least sometimes.
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A huge study suggests the Apple Watch can detect a worrisome irregular heartbeat at least sometimes but experts say more work is needed to tell if using wearable technology to screen for heart problems really helps. More than 419,000 Apple Watch users signed up for the unusual study, making it the largest ever to explore screening seemingly healthy people for atrial fibrillation, a condition that if untreated eventually can trigger strokes.People who received an alert were supposed to consult a study doctor via telemedicine and then wear an EKG patch measuring cardiac activity for the next week to determine the watch's accuracy.If it detected another irregular heartbeat while someone was wearing the EKG patch, 84 percent of the time it really was a-fib, he said.Saturday's study didn't include watches with that capability.To prove if detecting a-fib early lowers risk of stroke would require years of study.
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