My wife had a heart attack in January of 2014. Predisposed to high cholesterol and other medical maladies via genetics. Had 6 blockages, all of them 90% or more. Ended up having 5 bypass grafts. Doctors were surprised that she had so much blockage and a heart attack at her age (38 at the time) and that she survived the heart attack.
Severe post op pain where they cracked open her sternum (still has occasional pain even today, mainly when weather fronts are coming and arrive), and pain in her left leg where they harvested the veins for the grafts. Still has occasional pain in that leg, with edema, sometimes severe. The emotional stuff still gets to her even now. The "I should or could have died" part..........she realizes that the statistics are against her now. Much better than NOT having the surgery done, but having the cardiologist tell you that even after the surgery was a success, the longest any of his patients had lived afterwards was 18 years, and most former bypass patients average 10 or so years..........yeah, she has a lot on her plate.
Prayers heading your way.