I got a pacemaker when I was 24 and I resent the "old fart" comments. There are tons of young people with heart conditions and a pacemaker is a great way to track symptoms since the wires are there and recording events.

It is really good to know that certain things like iPods are going to cause issues, especially since you can wear the iShuffle on a cord around your neck while exercising, and that's right over a pacemaker!

But please, don't be stupid and think that only old people use internal monitors for heart conditions.