My Dad did survive with an expected full recovery, he got a stent in an artery that was 90% blocked. He had just a mild heart attack and there is no permanent damage.

However it was only that great of an outcome because roughly 20 years ago, when my mother was the age I am now, she had the same thing but much worse. She almost died. She had two completely blocked arteries with one thay had been blocked for so long, her heart naturally grew a vein to bypass the block. She got a stent for the other.

Her symptoms were ignored for months and written off as heartburn or pulled muscles because she was a young and otherwise woman. She recognized those symptoms in my dad and made him go in before it got worse. 

My moms heart problems were attributed to a medication she was on. One similar to what doctors have been trying to put me on over the last two years. 

Let me know when your book is ready. Or I volunteer if you need anybody to proof read it!