At 54, I recently got a pacemaker inserted for an AV block. It bothered me for several years. Wearing an event monitor, I had several 3 second pauses and one 4 second pause. The pacemaker has stopped that, but I still have PACs. I've been told not to worry about that. But I still tend to worry about them, thinking there will be a longer pause. There hasn't been, though. Thoughts?