An adult client with a tentative diagnosis of infective endocarditis is admitted
An adult client with a tentative diagnosis of infective endocarditis is admitted to an acute care facility. the medical history reveals diabetes mellitus, hypertension, and pernicious anemia. the client underwent an appendectomy 20 years earlier and an aortic valve replacement 2 years before this admission. what history finding is a major risk factor for infective endocarditis?