Hey all! I’m new to the site. I had a failed TAVR with subsequent replacement. I ended up with endocarditis and had a repeat replacement last Sept. After my last open heart, I developed complete heart block and had to have a pacemaker inserted (mine is epicardial due to DVT). I then also developed a fib and had to start beta blockers. I’m an avid runner and I’m having a lot of difficulty getting my stamina back. I was previously running between 10-15 miles a day and now can barely run 3. My cardiologist keeps telling me that I should just be happy that I can run at all but I’m truly frustrated that I’m not able to increase my activity. He told me it could be from either th beta blocker or the pacemaker but that I can’t change medications and the pacemaker is permanent. Any advice on what I can do to try and increase my physical stamina?