i am having next tuesday a new battery repkacing my St Jude i`ve had for approx 12years which one will they replace it with?I know a new one but dont know wich brand apparently they decide on the day,? my leads are all ok, will the new one be smaller with new technology etc?? hope so? also mine settings rate response is turned off 3d they call it, bcoz my own natural pacemaker is fine reason for my pacemaker is i have AVblock lower ventricle too slow receiving signal etc...anyhow they said its a quick procedure under local anesthetic,my main concern is that hope they replace it with St Jude again or one as good as it, hopefully even a bit smaller? thank you for any comments!