The Apple Watch Series 4’s long-promised electrocardiogram (EKG) feature may finally get support in the upcoming watchOS 5.1.2 update, according to an Apple Store training document obtained by MacRumors.

from https://www.theverge.com/circuitbreaker/2018/11/28/18116290/apple-watch-series-a-electrocardiogram-ekg-watchos-5-1-2
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