Actually they do. I have a unit that I put over the area in my shoulder and it reads the data from the Pacemaker, uploads it and sends it to my cardiologist. He can then upload changes to the way it works, target resting heartbeat, upper end exertion heart beat etc. and then the unit downloads the new data, through the skin, into the Pacemaker. It will work anywhere in the world with 110/220 volt electricity (just to charge the unit) and cell phone service.
SUPPORTING MEMBERBobWest Nyack Aviation, L.L.C. New York, New York - East Hampton, New York & Warwick, New York firstname.lastname@example.org