title: My sister had a heart attack a few months ago, but she didn't realize it at first because she didn't have any chest pain. Is this normal?
mesh_terms: D002637:Chest Pain / Q000209:etiology; D005260:Female; D006801:Humans; D009203:Myocardial Infarction / Q000150:complications* / Q000503:physiopathology; D012737:Sex Factors