Interesting article from Brandon Ballinger, co-founder of Cardiogram.
Almost every month, a news story pops up about somebody whose life was saved by their Apple Watch. As part of the mRhythm Study, we’re analyzing a lot of heart rate data, and decided to write a brief primer what both normal and abnormal heart rhythms look like when measured on an Apple Watch.
Note: although we believe wearables can save lives—and hope to play a part in making that happen—there is a lot of clinical groundwork that needs to happen first. Please don’t take any of the below as medical advice.
Normal Heart Rhythm is Irregular
Sometimes people say “irregular pulse” as a shorthand for an abnormal heart rhythm. That’s not quite right, because a normal pulse is irregular. In fact, it’s regularly irregular: your heart rate varies periodically due to your breathing rate and autonomic nervous system. The frequency and depth of variation reflects nearly everything that happens in your life, including your level of physical activity, emotional state, and whether you’re sleeping or waking.
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