Apple watch has a finger on pulse, but can’t replace a doctor

The Apple Watch has been quite successful as a smart watch. The company would also like it to succeed as a medical device. The recently published results of the Apple Heart Study in the New England Journal of Medicine show there’s still a long way to go.

An estimated six million people in the United States – nearly 2% – have atrial fibrillation, a type of irregular heartbeat that brings increased risk of events like clots, heart attacks and strokes.