![]() ![]() Libby points out, the innovations that enabled the first recordings of the heart's weak electrical currents date back to the early 1900s. Researchers used an Apple Watch Series 4 to record the ECGs, which were then uploaded to an iPhone 11 Pro - the latest available versions of those products at the time. ![]() Among the healthy people, the watch's accuracy was 90% for correctly noting the absence of a heart attack. The smart watch–generated ECGs were 93% to 95% accurate at correctly identifying and distinguishing between different types of heart attacks. For comparison purposes, both types of ECGs were also done on 19 healthy people. Two-thirds were men, and their average age was 61. Libby.įor the study, researchers obtained both standard and smart watch ECGs on 81 people who sought care for a likely heart attack at one Italian clinic from April 2019 to January 2020. So for now, the advice for the general public remains the same: "If you have chest pain or discomfort, don't mess around with your smart watch - call 911," says Dr. Also, even if someone with a suspected heart attack was able to capture successfully all nine ECG readings, the results would still need to be interpreted by a physician. The smart watch, like other popular smartphone–linked ECG devices, can have a wavy baseline if not applied carefully. In a few people, other health problems (including Parkinson's disease and a previous stroke) made it impossible to get a clear signal, Dr. In the study, physicians-not the study participants - placed the watch in those positions. One main reason: Obtaining an ECG with a smart watch requires carefully holding the back of the watch on the wrist and at eight specific locations on the chest and abdomen. Peter Libby, a cardiologist at Harvard-affiliated Brigham and Women's Hospital. "This study is more a proof-of-principle rather than something that's clinically useful," says Harvard Medical School professor Dr. While these new findings show potential, the real-world applicability is still years away. Now, a small study suggests that ECG readings taken with a smart watch may be just as accurate as a traditional ECG done in a medical setting. To diagnose a heart attack, doctors look for a distinctive pattern on a tracing of the heart's electrical activity, using a test known as a 12-lead electrocardiogram, or ECG. But detecting various heart problems with a smart watch could become a reality within the decade. This technology isn't ready for prime time yet. ![]()
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