I've had a lead replacement after less than 8 years, Tendril 1888 TC. St Jude /Abbott pm. There are a few others named as well, I had the 1888 Tc
i found several studies that conclude they problems early, after 5 years .
ill try and attach them.
it's a very difficult procedure to have the leads removed and replaced, Abbott is not being helpful or forthcoming on this subject.