I am 28 years old and have had my Guidant pacemaker since Jan 2002. At the time, I was so shocked to learn that I needed a pacemaker I did no research on what options I had and just took what the doctor offered. I found out on a Wednesday and had my surgery that Friday. After the recent negative news and recalls with Guidant (now Boston Scientific), I was wondering if anyone knows if it is possible to change pacemaker types without changing the leads into the heart? I was told that over time scar tissue develops in the leads going to the heart. It seems that once the leads are placed they are permanent. Is that true? I am due to get a replacement within a year and thought I should start planning.