Thirty seconds after pressing my finger on the side of my new Apple Watch Series 4 smartwatch, an electrocardiogram chart appears on the screen of my iPhone. Until two weeks ago, I would have had to go to a doctor’s office to measure of the rhythm of my heart beats—or maybe even the ER.
Now it’s available from my wrist any time, any where.
And back on the app on my wrist, there’s good news: I have a perfect sinus rhythm, according to the watch’s FDA-cleared ECG app. My heart is healthy.
