I was put on a pacemaker three days ago. The same day that it was put in my heart rate went up so high they decided to put me on a beta blocker. Now my heart rate is lowered so much that it's constantly kicking in my pacemaker. I'm not feeling good with it and wondered if anyone else had problems with beta blockers and how to get them adjusted. It's making me foggy in the brain along with this morning I had to episodes where I stopped breathing and woke up gasping for air. I'm attributing it to the beta blocker. Any suggestions?