The reason I brought up “normal sinus rhythm” and “atrial fibrillation” a few posts up is because those are two of the four possible results produced by the App

The reason I brought up “normal sinus rhythm” and “atrial fibrillation” a few posts up is because those are two of the four possible results produced by the Apple Watch EKG app, the other two being “low and high heart rate” and “inconclusive”.