Earlier quoted context omitted.
Okay, I hate to pile on to the advice section. Actually this is not advice, but just a random tip from a random person. I read a book this year that has several anecdotes of people in similar situations to your father-in-law. The doctor who wrote it is radical and outside of the mainstream. Yet, the things he writes make a ton of sense when you have nothing else to lose. It's a short read, and his clinical results sp…
While he didn't follow this specific diet, what he follows is pretty close and I really do think his diet choices are why he has lived as long as he has, at least for his particular situation. He has been practically obsessive about eating organic and most of it is home-grown (which is where he gets a lot of his exercise as well). Again he has done his research and takes a boatload of quite effective dietary suppleme…
Note: If you already know everything below, I am not talking down to you. I'm just writing it in case you haven't heard all of the information before. You can decide if it's valid information or not, I cannot say either way since I'm not a doctor.
The theory behind the diet is that if you eat a plant based diet, your Endothelial cells in your bloodline will activate and start removing plaque.
Here's a video about endothelial cells - https://www.youtube.com/watch?v=KgkEA0-8pFs
You can't eat the following - meat, fish, eggs, dairy, avocados, high fat nuts, or oil of any kind.
Here's a video where Dr. Esselstyn says "No Oil" - https://www.youtube.com/watch?v=b_o4YBQPKtQ
If you eat any meat, fish, eggs, dairy, avocados, high fat nuts, or oil of any kind, your endothelial cells will not reactivate.
The book is #1 on Amazon for Heart Disease, has 1451 Reviews, and is rated 4.6 Stars.
You can also watch "Forks Over Knives". I believe you can view it on Netflix.
Here's a 15min shortened version of "Forks Over Knives" - https://www.youtube.com/watch?v=-roZi4kAp90
I don't think you can be on a diet that is "pretty close" to this diet and still be on this diet. You have to remove all of the banned foods in order for the Endothelial cells to start reversing the damage.
You could also try a Raw Food Diet, but a Raw Food Diet is essentially also a Plant Based Diet.
I'm not a doctor. I have no idea if this actually reverse heart disease or would work for your father-in-law. But it's the only thing I've ever found on the internet that sounds like it might actually reverse heart disease.