If you are familiar with Ayurveda or naturopathy, they might be able to help your husband some. Arjuna is good for the heart, and garlic can be good for the cardiovascular system. I think green tea can be good for the heart too. Why don't you look into some of this stuff? You could also find an MD who practices functional medicine. Go to IFM.org I think they know how to do more than traditional doctors do.
Ilovesnow, I am praying for you and your husband!