@floridabonnie
You did not give your EF. It would indicate the level of heart failure you have. Remember heart failure is not the failure of the heart it is that it does not pump the normal amount of blood out of heart. It does not mean is has failed.

Know you EF is important. You did not mentioned your BP. BP plays a big role in heart failure as it can make the heart get larger dealing with the higher blood pressure and the bigger heart comes with reduction of EF and heart failure. I wish they would change the heart failure to reduced heart fuction (RHF) as that is what it is. Heart failure should mean the heart has failed and that is the morbidity.

I did not get HF from cardiovascular disease. I got a virus that got into heart muscle and caused scarring. That caused a LBB. I did not treat the HP and they caused enlargement of heart and reduced EF.

Find out if you don't know your EF and your PB. Look at medications that can help with those with your EP and Cardiologist to keep your heart from getting any weaker. You doctors will probably tell you to continue your exercising. Do I exercise? Yes, I do Sprint Triathlons and train almost very day. I have an EF of 25 but it has been stable for decades with medications.