title: [Doppler echocardiography determination of the severity of tricuspid valve stenosis].
abstract: To evaluate the diagnostic usefulness of Doppler echocardiography for assessment of tricuspid stenosis, data of eleven patients were compared with hemodynamic results. Using the pressure half-time method, stenotic tricuspid orifice area was calculated as the quotient of 220 divided by the pressure half-time. The pressure gradient across the stenotic valve was determined according to the modified Bernoulli equation using four times the square of the maximal velocity of the stenotic jet. A close correlation was found between the Doppler echocardiographically and invasively determined orifice areas (r = 0.97, SEE = 0.23 cm2). There was also a good linear relationship between the pressure gradients derived from both methods (r = 0.89, SEE = 1 mmHg). Thus, the assessment of tricuspid stenosis can be achieved reliably by noninvasive means with the aid of Doppler echocardiography.
mesh_terms: D000328:Adult; D001783:Blood Flow Velocity; D004452:Echocardiography; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D012212:Rheology; D014261:Tricuspid Valve / Q000503:physiopathology; D014264:Tricuspid Valve Stenosis / Q000175:diagnosis* / Q000503:physiopathology
vernacular_title: Doppler-echokardiographische Bestimmung des Schweregrades der Trikuspidalstenose.