Any mention of these things and death is pretty frightening. I've got two of the damn things in me. However, the article is baffling in the extreme. It sure appears to be written to alarm, and doesn't provide enough detail. I will definitely bring it up with the cardiologist in a few weeks and see what he says.
If this helps put your mind at rest, I have had a couple of them for twenty-two years without any problems. They have allowed me to continue an active lifestyle.