t tell you how many stages of heart failure there is, but I can tell you that I have stage 4, so I know there are at least that many. My EF is 20-30 percent, after 3 years of taking 25mg of
Coreg, twice a day, along with diltiaziem, and lasix(up to 120 mg. per day), I have improved from an EF of 15%. It wasn't just the meds that caused the improvement, but a strict diet, and as much exercise as I could manage on a daily basis.