Importance of Pressure Recovery for the Assessment of Aortic Stenosis by Doppler Ultrasound
- 15 October 1996
- journal article
- research article
- Published by Wolters Kluwer Health in Circulation
- Vol. 94 (8) , 1934-1940
- https://doi.org/10.1161/01.cir.94.8.1934
Abstract
Background Pressure recovery has been shown to occur distal to aortic stenoses in experimental and clinical studies. However, its clinical relevance in this setting has not yet been evaluated. Methods and Results To address the hypothesis that pressure recovery can cause significant differences between Doppler and catheter gradients in aortic stenosis and to examine the effects of aortic size, aortic valve area, and direction of the stenotic jet on these differences, stenoses with valve areas from 0.5 to 1.25 cm2 and aortic diameters from 1.8 to 5.0 cm were studied in a pulsatile flow model. Jets entered the aorta centrally or eccentrically with angles of 15°, 30°, or 45°. Overall, good correlation was found between Doppler and catheter gradients. However, when the various combinations of orifices and aortas were analyzed separately, slopes varied from 1.0 to 1.86, and the Doppler-catheter gradient differences ranged from −2 (small valve area with a large aorta) to 66 mm Hg (80% overestimation by Doppler ...Keywords
This publication has 14 references indexed in Scilit:
- Review of hydrodynamic principles for the cardiologist: Applications to the study of blood flow and jets by imaging techniquesPublished by Elsevier ,2004
- Effect of stenosis geometry on the Doppler-catheter gradient relation in vitro: A manifestation of pressure recoveryJournal of the American College of Cardiology, 1993
- Effect of prosthetic aortic valve design on the Doppler-catheter gradient correlation: An in vitro study of normal St. Jude, Medtronic-Hall, Starr-Edwards and Hancock valvesJournal of the American College of Cardiology, 1992
- Pressure recovery distal to a stenosis: Potential cause of gradient “verestimation” by Doppler echocardiographyJournal of the American College of Cardiology, 1989
- Simplification of the Doppler Continuity Equation for Calculating Stenotic Aortic Valve AreaJournal of the American Society of Echocardiography, 1988
- Intraoperative doppler echocardiography in hypertrophic cardiomyopathy: Correlations with the obstructive gradientJournal of the American College of Cardiology, 1987
- Aortic stenosis in adults. Non-invasive estimation of pressure differences by continuous wave Doppler echocardiography.Heart, 1985
- Non-invasive assessment of aortic stenosis by Doppler ultrasound.Heart, 1980
- The fluid mechanics of aortic stenosis—II. Unsteady flow experimentsJournal of Biomechanics, 1976
- The fluid mechanics of aortic stenosis—I. Theory and steady flow experimentsPublished by Elsevier ,1976