Heart Failure Support Group
Heart failure is a condition that can result from any structural or functional cardiac disorder that impairs the ability of the heart to fill with or pump a sufficient amount of blood throughout the body. It is often undiagnosed due to a lack of a universally agreed definition and difficulties in diagnosis, particularly when the condition is considered "mild."

I would strongly recommend you get your bone density and vitamin D levels checked as well. There is a very high correlation between chf and vitamin D deficiency.
Hang in there you can over come all of these challenges.
Hugs, Raoul