Focus on getting healthy, lose the stress, you'll be better for it.
I'm sure I'm not alone in having cardiac issues. In my case, I went in for an angiogram 22 years ago, and they would not let me leave the hospital. I remember waking up after the angiogram, and the stent guy was babbling something about being able to do 2, maybe 3 of the blockages, but not all 4. So it was a bypass for me.
Lesson for you - it could be worse!!

Get well and learn to deal with the stress. And obey your doctor. Ask questions and always, always, push for help. It won't always be volunteered by the people you would expect to volunteer it.