I had a guidant pacemaker put in place in 2001 and it lasted until january of 2007. Now it has run out of batteries and had to have another one put in this year in January. I went to my pacemaker check at a local pacemaker clinic and the technologist told me that my pacemaker was already over 20 percent used. Is this bad and what can be done about it. I have been extremely tired lately and short of breath. I already had two electrical heart attacks and 2 major strokes.