A pulse oximeter is a device that clips on your finger, toe, or earlobe to measure blood oxygen saturation. Here's how it works and how to read it.
You can monitor your heart rate on Apple Watch with the Heart app, and set up notifications for high or low heart rate, or an irregular heart rhythm.
Live Science on MSN
Scientists invent 'Pulse-Fi' prototype — a Wi-Fi heart rate monitor that's cheaper to set up than the best wearable devices
Engineers are in the early stages of harnessing Wi-Fi as a way to monitor heart rates, but don't expect to use your home ...
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