title: The son of a friend of mine recently had a heart attack at age 40. He was in good shape and passed a physical exam a few months ago. It's shaken my faith that we're making progress against heart disease. How rare are cases like this.
mesh_terms: D000328:Adult; D000367:Age Factors; D006801:Humans; D008297:Male; D009203:Myocardial Infarction / Q000209:etiology* / Q000235:genetics; D012307:Risk Factors