My younger sister and I had pacemakers two weeks apart me for Atrial Fibrilation. My sister had been in heart failure for 18 months her ejection fraction went down to 13% they thought they could get her heart functioning better with the exercise and medication. She got her ejection fraction up to 31%. Then she had a new knee installed. She had a pretty hard time with medications clashing but came good. She then became unwell ended up in hospital for 6 weeks then they decided to go ahead with a pacemaker, defibrillator and synchroniser. Her ejection Fraction is now 51%. She's really well. My pacemaker is to regulate my heart beat. I'm due to have a knee replacement any day now. Pacemakers are great I still get AF but not anywhere as bad. They say 20%. I had an ablation to. All will be well talk to your cardiologist all the best for the festive season