Summarized very well in this article in MobiHealthNews:

"...The University of Mississippi Medical Center, which escaped financial penalties during the initial measurement period, July 2008 to June 2011, has reduced readmissions for heart failure by having doctors call patients at home following discharge. “It’s a fairly simple approach, but it’s very labor-intensive,” Chief Quality Officer Michael Baumann told KHN... Remote, home-based monitoring, on the other hand, requires little or no work on the doctor’s part. It’s a reasonably small investment compared to the money hospitals stand to lose by not getting readmission rates down. And the data remote monitoring systems collect certainly are more accurate and detailed than what a patient might report over the phone..."