Carolyn, we understand, believe me. I had forgotten a lot of this, as my mom had CHF 25 years ago, but it sounds like the dr. is really trying to get it under control, and once he does, the continuing medication can take over.
Please, please, know your dad is in our prayers, as are you, Charlie, Daniel, and everyone else concerned. Also, we need to know that you are going to focus on keeping yourself in good shape too. Try to get some rest, dear, for stress can be more damaging than we know at the time.