title: [Study of the nature of the movement of obturating elements in artificial heart valves of the vent type with the aid of photoelement].
mesh_terms: D005069:Evaluation Studies as Topic; D006349:Heart Valve Diseases / Q000601:surgery; D006350:Heart Valve Prosthesis / Q000592:standards; D006801:Humans; D008027:Light; D008722:Methods; D010783:Photometry; D013997:Time Factors
vernacular_title: Ezuchenie kharaktera dvizheniia zapiraiushchikh elementov v iskusstvennykh klapanakh serdtsa ventil'nogo tipa s pomoshch'iu fotoelementa