But in otherwise young health patients, it remains unclear how much benefit there is in going out to look for it. Suffice it to say, that any time you apply a test to a large number of otherwise healthy people, you have to be ready for some false positives.Ītrial fibrillation is an important condition to diagnose, as giving high-risk patients anti-coagulants can lessen the risk of stroke. The reasons for this are mathematically fascinating, but I will spare you the proof. Tests tend to perform better in sicker patients and less well in healthier ones. This advertisement has not loaded yet, but your article continues below. The novelty of the Apple Watch, though, is that it doesn’t just measure your heart rate it also measures the electrical waveform of your heart rhythm and can detect if you are having an arrhythmia. A study in JAMA Cardiology found that four of the commercially available wrist-worn heart rate monitors (Apple Watch, Fitbit Charge HR, Mio Fuse and Basis Peak) were reasonably accurate at measuring heart rate, although not quite as good as a device that included a chest strap heart rate monitor. Heart rate monitors are not new, of course. But a new feature of this latest Apple Watch is interesting because, unlike other devices, it can measure the electrical activity of your heart. Given that I’m not someone who is overly fond of new gadgets, the arrival of the new Apple Watch 3 didn’t really make that much of an impression on me. "The danger with any new medical technology," writes Christopher Labos, is that in the enthusiasm to be an early adopter, for what is an admittedly cool gadget, we risk engaging in a population-wide screening strategy that is decidedly flawed." Photo by Eric Thayer / Getty Images Article content Join the conversation The Apple Store on Fifth Ave.
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