Determination of the most appropriate velocity threshold for applying hemispheric flow convergence equations to calculate flow rate: selected according to the transorifice pressure gradient. Digital computer analysis of the Doppler color flow convergence region.

Non-invasive assessment of aortic stenosis by Doppler ultrasound.

1980 • 516 citations

Review of hydrodynamic principles for the cardiologist: Applications to the study of blood flow and jets by imaging techniques

1988 • 305 citations

Instrumentation and physical factors related to visualization of stenotic and regurgitant jets by Doppler color flow mapping

1988 • 297 citations

Doppler color flow “proximal isovelocity surface area” method for estimating volume flow rate: Effects of orifice shape and machine factors

1991 • 206 citations

Dynamic aspects of acute mitral regurgitation: effects of ventricular volume, pressure and contractility on the effective regurgitant orifice area.

1979 • 179 citations

A new method for noninvasive estimation of ventricular septal defect shunt flow by Doppler color flow mapping: Imaging of the laminar flow convergence region on the left septal surface

1991 • 62 citations

Color Doppler Determination of Regurgitant Flow: From Proximal Isovelocity Surface Areas to Proximal Velocity Profiles: An In Vitro Study

1992 • 50 citations

Experimental Studies to Define the Geometry of the Flow Convergence Region: Laser Doppler Particle Tracking and Color Doppler Imaging

1992 • 49 citations

Accuracy of flow convergence estimates of mitral regurgitant flow rates obtained by use of multiple color flow Doppler M-mode aliasing boundaries: An experimental animal study

1993 • 39 citations

The proximal flow convergence method for calculating orifice flow rate requires correction for surrounding leaflet geometry

1991 • 33 citations

Color Doppler diagnosis of mechanical prosthetic mitral regurgitation: Usefulness of the flow convergence region proximal to the regurgitant orifice

1990 • 31 citations

Validation of a new method for valve area calculation using the proximal isovelocity surface area in patients with mitral stenosis

1990 • 18 citations

Accuracy of flow rate calculation in funnel orifices by color Doppler zero-shift “proximal isovelocity surface area” method

1991 • 12 citations

Effects of orifice size and shape on flow rate estimated from flow convergence region imaged by color Doppler flow mapping proximal to restrictive orifices: An in vitro study

1990 • 11 citations

Effect of flow rate, orifice size and aliasing velocity on volume calculation using Doppler color proximal isovelocity surface area method

1990 • 10 citations

A new automatic computer method for measuring mean flow convergence radius from color MQ modes provides more accurate flow rate estimates: In-vitro and animal studies of mitral regurgitation

1991 • 9 citations

Flow convergence calculations of flow rate through non or minimally restrictive orifices: In-vitro studies

1991 • 5 citations

Comparison of analog and digital methods of transferring colour Doppler image data for off-line analysis

1990 • 4 citations

Calculation of regurgitant volume and regurgitant fraction using the color Doppler “proximal isovelocity surface area” method

1991 • 4 citations