title: [Difficulties of diagnosis of certain acquired heart defects in middle-aged and elderly persons].
mesh_terms: D000367:Age Factors; D000368:Aged; D001024:Aortic Valve Stenosis / Q000175:diagnosis; D003951:Diagnostic Errors; D006349:Heart Valve Diseases / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D006973:Hypertension / Q000150:complications; D008875:Middle Aged; D008946:Mitral Valve Stenosis / Q000175:diagnosis; D013923:Thromboembolism / Q000150:complications
vernacular_title: Trudnosti diagnostiki nekotorykh priobretennykh porokov serdtsa u lits pozhilogo vozrasta