De: "determine the cause of your congestive heart failure"
I've not been following the conversation thread very closely, but I want to reinforce: finding the CAUSE is essential.
I would FIRE any doctor, immediately, who doesn't seem obsessed with finding the cause; they are grossly incompetent, or maybe they just don't care about your life very much. They should lose their license. And I am not making those statements lightly, nor in jest.