My mother had a heart attack 3 weeks ago. She's 53 years old, she never had high levels of cholesterol, she's not overweighted , she used to exercise and does not smoke, no family history of MI.
She did an angioplasty and stent to the 99% blocked artery and the doctors found 3 arteries with stenosis (70% and 30%).
What can cause a MI when you don't have all the major risk factors?