I have had a pacemaker for 9 years now - in fact now on my second one. The advice to use a sling in the first few weeks after surgery was dropped some years ago, as the restriction in movement can result in frozen shoulder. You may want to check out
Pacemakerclub.com - there are lots of other pacemaker users and they are really helpful. I learnt a lot from them. I think it is fair to say the consensus view there is that the risk of pulling the leads out of the heart is quite low. There is slack in the wires and you would have to REALLY stretch to do any harm.
Some other points:
- Going through airports you don't need to declare the device - just walk through the security arch like other people. (I always carry my pacemaker ID card when I travel, but have never been asked for it).
- Nothing in the domestic environment is likely to interfere with it, though it you have an induction hob don't lie on it! Keep a 6" distance from anything you are worried about.
- In terms of sleep, a pacemaker will help because your heartbeat won't drop too low, but actually you may find your pulse is now stronger, so you don't sleep quite as well until you get used to your new bionic body!
- If you drive you probably will need to declare it to the licence people.