Hey HN,

Johnson and I are co-founders of Cardiogram, and we're working with UCSF cardiology (the Health eHeart project) to launch the mRhythm Study today.

We'll be giving a talk with more technical detail on our machine learning approach at Strata 2016, as we mention in our blog post: http://blog.cardiogr.am/2016/03/16/have-an-apple-watch-you-c...

But let me know if anybody has questions on machine learning in medicine, heart rate sensors, cardiology, or anything else!