I can attest to Co-Q10's ability to heal cardiomyopathy. Back in the late 80's my 7 yr old cat was diagnosed with it. I put him on 30mg of coq10 twice a day (roughly 3x his weight of 10lbs) along with a homemade diet and a vitamin powder that I got from "The Natural CAt" with some tweeking of my own. At the 8 month check up, his cardiomyopathy was completely reversed. The only symptom was a floppy valve that caused a murmur. He lived to be 18.
Everything that DQ said plus large amounts of coQ10. At least your body weight in mg 2x daily -- double or triple would be even better.