[On a method of measuring the areas of the mitral, aortic and tricuspid ostium before and during surgery for combined stenosis].
D001024:Aortic Valve Stenosis / Q000601:surgery*; D006801:Humans; D008946:Mitral Valve Stenosis / Q000601:surgery*; D014264:Tricuspid Valve Stenosis / Q000601:surgery*
K metodike izmereniia ploshchadeĭ mitral'nogo, aortal'nogo i trikuspidal'nogo otverstiĭ do i vo vremia operatsii u bol'nykh sochetannymi stenozami.