Carvedilol
"I was diagnosed with heart failure back in 2002.   The doctors started me on coreg and it definitely worked.   My EF went from 39 to 56 over time.   I have been on coreg since that time to treat my blood pressure problems and my EF has been normal since.   I will always be on high blood pressure pills because even with a weight loss of 90 lbs since 2002, I still have high BP.   Coreg is one of the few meds that does not give me any side effects and works great."