Hi Julie !,
Yes dear there was a re-call back in 2007 on a lot of Medical Devices,especially 'Guidant' whom eventually ended up in court.Of course their issues involved both the (Leads) and the (Battery Depletion)
Replacing the Battery/Device itself is rather routine. It becomes more complicated when having the (Leads) replaced. I am on my (5th) one now. The latest being a Medtronic Protecta XT CRT (4)Lead Defibrillator.
I also have a 'Home Monitoring' system. In addition when your device reaches a certain specification, generally you have up to 3 months left to replace it.
I would not be too concerned about the procedure in itself. However the sooner the better in scheduling the procedure, would be in your best interests.
Just thought I would add my 2 cents..Give everyone my best :)