I'm sorry to hear this. Here is my positive story to brighten your day:
When my bio mother's bf had a massive heart attack 2 years ago, he was fed plate rations, as I call them - 1/2 fruits and veg, 1/4 whole grain, 1/4 protein. His protein was usually a lean meat, his grain was brown rice, multigrain pancakes, whole wheat bread, etc. His fruits and vegetables were often steamed or marinated in olive oil w/ Mrs Dash (salt-less spice mix).
He also attended 8 weeks of free training to re-learn how to live. They had nutritional classes and went over what they were eating (ie how to eat soy, remember to rinse canned beans, etc). By the time this happened, he was already following my diet for him and it was lauded as "perfect" for his needs. It did not eliminate meat, but it reduced it and follow the rationing. Just after his heart attack, he was declared unable to work ever again. 6 months later, he was working a full-time manual labour job again, despite being in his late 40s, with a heart better then before his heart attack.