https://www.cnbc.com/2017/09/20/apple-watch-as-diagnosis-tool-cardioligists-skeptical.html

Apple is moving ahead with a plan to screen for disease with its Apple Watch, starting with a clinical study.

Earlier this month, the company announced it is partnering with clinicians at Stanford to assess whether the smartwatch's heart rate monitor can accurately pick up on an abnormal heart rhythm called atrial fibrillation. That health condition is associated with blood clots and strokes, but is possible to treat it if detected.