Transcript for Apple Watch reliably detects atrial fibrillations: Study
Next tonight here, to your health. And a new study involving the apple wap. It shows it is 84% reliable in detecting an irregular heartbeat. Could it save lives? Here's will Carr. Reporter: For Ed dentel, a husband and a father with an active lifestyle, his apple watch, according to his doctor, may have saved his life. He kind of laughed, he's like, do you own apple stock? I'm like, no, I don't he's like, okay, you may want to consider buying some. Reporter: And dentel is not alone. According to study at Stanford funded by apple, the apple watch reliably detects atrial fibrillation, a serious form of irregular heartbeats. AFib can lead to blood clots, strokes, even heart failure. The study says apple's AFib alerts turned out to be 84% accurate. Tried it on my left wrist, on top, AFib left. Wrist on bottom, AFib. Right on top AFib AFib AFib. I looked at it and said, there might be something to this. Reporter: Researchers say the watches likely saved people from strokes, even death. Doctors say an apple watch is a great health tool but shouldn't replace your normal visits. They say, if you combine both, you can see great results. David? Will Carr, thank you.
This transcript has been automatically generated and may not be 100% accurate.