title: [Evaluation of the severity of congenital aortic valve stenosis by M-mode echocardiography. Comparison with hemodynamics and data from the literature].
abstract: Previously published M mode echocardiographic formulae for the prediction of transvalvular aortic pressure gradients and/or systolic left ventricular pressure, were tested in a series of 26 children aged 2 to 17 years with compensated valvular aortic stenosis. The formulae using the end systolic parameters Ws/Ds expressing the ratio of the thickness of the left ventricular posterior wall to the diameter of the ventricular cavity were useful, irrespective of the value of the constant of proportionality "C" (225 or 245). Formulae using the end diastolic measurements of the left ventricular posterior wall; of the interventricular septum and diameter of the left ventricle also gave a good estimation of the transvalvular aortic gradients or left ventricular pressure.
mesh_terms: D000293:Adolescent; D001024:Aortic Valve Stenosis / Q000151:congenital* / Q000175:diagnosis / Q000503:physiopathology; D002648:Child; D002675:Child, Preschool; D004452:Echocardiography / Q000379:methods*; D005069:Evaluation Studies as Topic; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male
vernacular_title: Estimation de la sévérité d'une sténose valvulaire aortique congénitale par échocardiographie TM. Comparaison avec l'hémodynamique et les données de la littérature.