If you're in constant a-fib, how is it that the a-fib is "settling down".
A study published in the journal Panminerva Medica demonstrates PycnoQ10®, a pycnogenol (French maritime pine bark extract) and coenzyme Q10 (CoQ10) combination, naturally improves heart function. The 12 weeks study results showed heart ejection fraction increased by 22.4% in the treatment group but only 4% in controls.
Just to add, I worsened my existing magnesium deficiency after surgery (any type of stress uses up more magnesium). Not enough magnesium affects heart rhythm (magnesium deficiency can cause afib). It was 2 years after surgery before I figured out I had a severe magnesium deficiency! smh.
A lower EF in itself is afaik not a reason to stop jogging.
It might be that you experience the limitations that the lower EF brings with it, so that you will need to jog at a lower speed that you used to do.
Moderate regurgitation is also not a reason to become inactive.
I do not know if the afibs might be a reason to take it easier.
Imo, physical activity keeps the heart in good shape and should therefore be encouraged unless there is a very good reason not to. Your cardiologist can best advise you what is best for you.