Could Apple Watch Series 4 Save Your Life?

CNBC’s Chrissy Farr tried out the new ECG app and irregular heart rate notification for Apple Watch ahead of its release on Thursday. Here’s how to use it.

The Apple Watch has always had an optical sensor to monitor heart rate called a PPG, which is short for photoplethysmogram. Heart rate gives you a measurement of beats per minute. But an EKG measures the electrical activity — think of it as adding more dimensions to the rhythm — and provides a more indepth picture of the heartbeat.

In recent years, companies like AliveCor and iRhythm have been developing portable single-lead EKG devices, which can be more easily used by consumers in the home. They are typically smaller and easier to use than the standard test you’d get in the hospital, which is a 12-lead EKG. Apple’s sensor is similar to a single-lead EKG.
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Your Apple Watch Can Now Detect Irregular Heart Rhythms

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