Hey there, I am sorry to hear of your husband's new dx of CHF. My hubby was dx in September of 2011 and he is 65 years old so I understand your concerns.
I wish I could give you the straight answer you so desperately want; unfortunately, it is not possible. The Cardiologist told my husband to carry on with his life as usual and he has. He also has Crohn's Disease, and nasty arthritis and some mild kidney function problems. He only has one kidney so we walk a fine line in choosing meds for him.
I wish you peace and do keep talking to us as we are always here to support and listen to you.