Infective endocarditis.
D000367:Age Factors; D001022:Aortic Valve Insufficiency; D004698:Endocarditis, Subacute Bacterial / Q000209:etiology*; D006345:Heart Septal Defects, Ventricular; D006801:Humans; D008875:Middle Aged; D013290:Streptococcal Infections / Q000150:complications*