Judith, sounds like you have a lot of heart issues. Your weakness and dizziness is obviously due to your heart. With an ejection fraction of 20% the weakness is probably not going to go away. To help with the dizziness when you stand, try sitting on the edge of a chair or bed for several minutes, give your heart a chance to catch up with the movement, then stand slowly. A multivitamin may help some, maybe you should talk further with your cardiologist regarding treatment. There is such a thing as a heart pump to assist your heart, you might ask him if you are an appropriate candidate. Good luck to you! :)