I have had a pacemaker for 2 years, as pulse was at 20 while running, then it was changed in April 2015 as it was eroding through my skin, placed from left side of chest to right side, then in September 2015 pulse up to 220 while exercising, had to have a pacemaker-defibrillator implanted. I feel great, no problems except the leads from the pacemaker defibrillator came loose and I can feel it against skin when I touch the area. Went to the doctor who put in all three, and he said it looks as if the sleeves of the suture came loose. Not a concern unless it comes through the skin. I went for a second opinion and the doctor confirmed that information. i feel great, continue to exercise and have no ill effects from any of the implants. I also have AFIB and the only problem and this came on about a month ago, when I feel a flutter from the AFIB, I have a pain in my right upper jaw. Been to the dentist 4 times over it and he assured me everything all right with the teeth and gums. Have to see the cardiologist in two weeks and will find out more. Hope this helps.