All this is very third hand. Your friend is on a conveyor belt, she has been seen by an anaesthetist, he knows the problems.
This is very likely to be what we called aortic sclerosis, changes due to aging. The older you get the more likely it is. It is mild. we dont know as we havent seen the results.
You are not doing her a favour by asking her garbled questions to us: all expert cardiologist I assure you, and garbling the answers back. She has already been seen and they know the issues
[My mother has a lumpectomy at age you know 90 1/2, and they said oo - you have had rheumatic fever with heart valve damage. ( must be mitral damage as well as aortic) and she said
oh yeah - - I was in bed for a year in India 1917 and noone knew what was wrong with me....]