Re: Heart Failure... Help!
It seems your mom likes to keep active because sitting around thinking about things can drive people absolutely mad - which is under-stable. However health wise it is definitely important she decreases her activity and perhaps finds something to do that doesn't require much effort and exhaustion on her behalf.
I would try switching to an organic diet. It is concerning she only has 20% of functioning. You may want to seek an opinion from another doctor or cardiologist in your area.