A few years ago I was diagnosed with 15% ejection fraction. The doctor prescribed Coreg, which I've taken everyday since, and my EF is now 40%. Of course it has a lot to do with lifestyle changes, such as losing any excess weight, if she smokes, quit, if she drinks alcohol, quit, etc. Excercise as much as tolerable, which means until she can no longer talk without feeling short of breath, then she needs to quit what she is doing, rest until she feels fully rested, and then try again.