Apple Watch detects irregular heart beat in large U.S. study

“The Apple Watch was able to detect irregular heart pulse rates that could signal the need for further monitoring for a serious heart rhythm problem, according to data from a large study funded by Apple Inc., demonstrating a potential future role for wearable consumer technology in healthcare,” Manas Mishra reports for Reuters. “Researchers hope the technology can assist in early detection of atrial fibrillation, the most common form of irregular heart beat. Patients with untreated AF are five times more likely to have a stroke.”

“Results of the largest AF screening and detection study, involving over 400,000 Apple Watch users who were invited to participate, were presented on Saturday at the American College of Cardiology meeting in New Orleans,” Mishra reports. “Of the 400,000 participants, 0.5 percent, or about 2,000 subjects, received notifications of an irregular pulse… Some 84 percent of the irregular pulse notifications were later confirmed to have been AF episodes, data showed.”

Apple Watch Series 1 or later with watchOS 5.1.2 sends a notification if an irregular heart rhythm such as AFib, is identified. Apple Watch Series 1 or later with watchOS 5.1.2 sends a notification if an irregular heart rhythm such as AFib, is identified.

“For Apple, the data provides firepower as it pushes into healthcare,” Mishra reports. “Its new Series 4 Watch, which became available only after the study began so was not used, has the ability to take an electrocardiogram to detect heart problems and required clearance from the U.S. Food and Drug Administration.”

Read more in the full article here.

MacDailyNews Take: Apple Watch has already saved many lives and wil go on to save untold more in the future!

Apple Watch leads North Carolina woman supraventricular tachycardia diagnosis – February 12, 2019
New Apple Watch helps New Hampshire man detect he was in atrial fibrillation – January 9, 2019
Apple Watch saves another life – January 3, 2019
Apple Watch alerts man to life-threatening heart problem – December 11, 2018
New Apple Watch features will transform heart health – December 6, 2018
ECG app and irregular heart rhythm notification available today on Apple Watch – December 6, 2018
Apple Watch Series 4’s electrocardiogram feature could do more harm than good – September 13, 2018
How Apple Watch saved my life – September 10, 2018
Apple Watch saves another life – August 7, 2018
Apple Watch saves yet another life – May 11, 2018
Apple Watch: How to enable Elevated Heart Rate notifications – May 8, 2018
Apple Watch saves life of New York man – May 3, 2018
Apple Watch saves Florida teen’s life – May 1, 2018
Apple Watch saves a mother and her baby after a car crash – February 16, 2018
Apple Watch saves kitesurfer stranded a mile off the California coast in great white shark-infested waters – November 13, 2017
Apple Watch saves another person’s life: ‘It would have been fatal’ – October 16, 2017
How my Apple Watch saved my life – July 25, 2016
A real lifesaver: Apple Watch saves lives – March 28, 2016
Man credits Apple Watch with saving his life – March 15, 2016
Apple Watch saves teenager’s life; Tim Cook offers thankful teen an internship – October 2, 2015


  1. Perhaps with such a large sampling of the population, done for the first time over a long period, what they are learning is that such irregularities are actually a fairly normal occurrence in the human heart beat.

    1. 0.5% is 1 in 200. If that is a true reflection of population then it is quite a high incidence. Remember this is people who have an Apple Watch and signed up for the study (including myself).

      1. Rush loves Apple, hates Beto for the fraud that he is, and would surely see a-fib happening to his own heart and that of his listeners if the drunken DUI escapee Beto Nororke ever became the President. He’d be worse than Obama, and who the heck needs an LSD addled feminist eco warrior that is VetoBeto? #F-OFF-BETO-YOU-SAD-SORRY-LOSER-AND-F-OFF-SAD-SORRY-BETO-SUPPORTERS-LIKE-NASTY-SEAN

          1. You’re the coward, Citizen X. A leftist loser is always a coward – you’re coward No.1, hopefully one day you will be an ex-citizen because you don’t deserve citizenship but a jail cell.

            You’ll show just how much of a coward you are with some kind of typically nasty response. We’re all waiting to see your cowardice again.

            1. First What Year Is It has unfortunately reproduced and his spawn has just discovered the interwebs. The poor brainwashed home schooled brat thinks that his purpose in life is to expose his anti-fact partisan hateful rhetoric far and wide. Firsty has convinced his pupil that he is superior to everyone else, because he is first in his class of one.

              Worse, Spineless Stevejack gives this screed a platform.

              Beto and Jobs have very similar interests, centrist beliefs, and backgrounds. It is pure hypocrisy for someone to nonsensically attack Beto while deifying Jobs. But of course, First and his ilk will cherrypick whatever outlyer data points it takes to slander anyone not on the Putin team.

            2. “Fake Citizen X”
              – accusation without facts. Paranoid that Citizen might not be native???

              “Jail cell”
              – On what charge??? For exercising his constitional right of free speech?

              The shrill attacks form the right show how little they know about the constitution or society.

              Russian troll, go home.

        1. potty mouth strikes again

          right wing assholes on mdn claim all politicians are stupid. then they slander a Jobsian computer whiz who ran a software company. right wingers instead follow the directions of a school dropout rock jock who tells them in many ways that slandering and screwing your neighbors is the height of patriotism.

          i will vote for independent thinking candidates of any party who offer common sense inclusive solutions to problems and inefficiency. your fear mongering and rabid partisanship is pathetic.

          1. Yes, you are a potty mouth and a left wing a-hole, go vote independent, it’s the same as voting left wing, sad you are too dumb to understand that.

            1. Is this what MDN supports now?

              I agree with the rational, non-hate-filled posts above — the MDN braintrust seriously needs to clean up their forums. Nobody is convinced by the offensive right wing screeds.

              Also: since when is independent thought “left wing”? You would have to be off the right end to start labeling centrists anything but what they are: focused on actually solving issues, instead of carrying water for corrupt political parties.

        1. Yes, all you have is self-hate, which you spew to all and sundry showing us how pathetic you are.

          Go on, respond, show us your hate again and hate, it is YOU.

    1. rush limpballs will tell you to go to the dominican republic for your hookers and bring plenty of viagra . also have your housekeeper get your oxy.

      get a brain, parrot.

      1. Left-wing Citizen X, the true parrot who parrots the rantings of left wing rats.

        Crotchizen X,
        You are best known as a left wing ranted on MDN message boards,

        Clappity clap clap on your scumchievements in life – they and you are pathologically pathetic.

          1. Time to Doxx Citizen X and send a swat team and a few right wing hit men to CitiZen X’s hovel to teach him a lesson

            Watch over your shoulder buddy

    2. Keep on posting, political troll. Every time that you post your drivel, another donation goes to Beto. He greatly appreciates your help in fund raising.

      By the way, you do realize that “Veto” and “Beto” do not rhyme, don’t you??

    3. Apple Watch to “Veto Beto”:

      AW cannot detect any heart in your body. Please seek professional psychological help immediately. Refrain from all hatemongering and proceed directly to the nearest psych ward!

  2. I read somewhere that v12.2 is going to close a “loophole” allowing ECG outside of the US. Too bad. It has been six months +/- since the Series 4 was released. Hope to see ECG functionality added in more countries soon!

    1. In the EU, a company has to get a CE mark status from an EU certified body in order to market most medical items.

      Hence, I know Apple is working toward getting CE mark clearance.

      1. CE marking is a certification mark that indicates conformity with health, safety, and environmental protection standards for products sold within the European Economic Area (EEA).
        This does not provide clearance to use as a medical diagnostic device. Regulatory clearance for that is far more extensive.
        However, as an early warning device it appears to perform very well. 84% accuracy is very good.

  3. While the capability of the Apple Watch is great and has helped many people, one should not be lulled into complacency concerning their health just because the Watch says AOK. My Series 4 says I have a normal rhythm. My Blood Pressure checker says I have adnormal rhythm. Several doctors have confirmed the adnormal rhythm, (afib) and is quite obvious. The also say the Watch won’t likely catch my version. The other features of the watch that might also catch the issue, don’t. Now on ‘blood thinner’. Don’t let your guard down based on watch input.

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