[The status of the contractile function of the myocardium in the middle-aged and aged].
D000368:Aged; D000375:Aging; D005260:Female; D006321:Heart / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010701:Phonocardiography
Sostoianie sokratitel'noĭ funktsii miokarda u liudeĭ pozhilogo i starcheskogo vozrasta.