Hi manifestor, I am not too sure about
the site you visited before but I have one for you that is wonderful...it is from the Cleveland Clinic and explains everything in detail. http://www.clevelandclinic.org/heartcenter/pub/guide/tests/procedures/pacemaker.htm
Cleveland Clinic is much like the Mayo Clinic so their info is spot on. I dont know what the % of lead revisions are among people who have the implants but 9 out of 10 seems a bit high.
In my case I did say before that I have bradycardia which is low heart rate. I also have MS and an Autonomic disorder which is neurological and has greatly effected my blood pressure. So when I became sick with the SSS and bradycardia in 10/05 I also started to have passing out spells when I stood up because my blood pressure would fall. It is extremely low. The doctors thought the pacemaker would help my BP but it didnt so I continued to have falls and yes, I did end up pulling out both leads from my heart 1 week post surgery.
You have to understand though that displacing the leads isnt easy because right after the procedure they start to scar into place. I was also having seizures with my falls due to lack of oxygen to my brain. So who knows what the cause was to the displacement. Anyhow, I did have a revision done where the put the leads back into place and this time since my cardiologist knew that the falls would continue he tied them down securely.
All this really did was prolong the recovery time, and of course make the site more sore and noticeable. Since I am female that is a concern for me even still but hey I have to have it.
Check out the link I have posted and let me know if it helps. Take care