It is possible in some cases. I went from 10% to 20% on just meds. Wasn’t improving fast enough so had a CRT-D implant last August along with added meds and now my echo showed last month I was up to 65%.

My heart is so weak the doctor said my EF probably won't come up

When my Heart Disease first presented my 10-15%! After 3 months on Entresto and Farxiga it was up to 30%! But I still felt like crap so my electrophysioligist suggested an ICD! In May I got a biventricular Defibrillator and Pacemaker! Next Echo it was up to 58% and has stayed there for the last year! I’m totally psyched! And I am less anxious knowing that if my heart stops The Pacemaker will keep me going until Help arrives! The Defibrillator has kept my heart rate stable and without any shocks! I’m a Happy Woman today!

Sad part is I don't have bad days really I can do most everything I want

I went from 20 to 28 on meds and cardiac therapy. Then up to 60 after AICD implant and therapy. I still have bad days sometimes, but definitely feel better overall.