There are limited data on the potential influence of blood viscosity on the quantification of
valvular regurgitation by color Doppler in the clinical setting. This study was designed to …

To evaluate usefulness and limitations of proximal jet dimensions for the quantitation of
valvular regurgitation, fluid jets were created in a pulsatile flow model, and proximal jet width …

Objectives. This study sought to investigate the applicability of a current implementation of a
three-dimensional echocardiographic reconstruction method for color Doppler flow …

The objective of this study was to determine the validity of estimation of regurgitant volume
by visual assessment of color flow Doppler display. An experimental apparatus was …

Abstract Previously described Doppler color How mapping methods for estimating the
severity of valvular regurgitation have focused on the distal jet. In this study, a newer …

The spatial distribution of simulated regurgitant jets imaged by Doppler color flow mapping
was evaluated under constant flow and pulsatile flow conditions. Jets were simulated …

Viscous velocity loss becomes important only at very small holes where the volume of
regurgitation is negligible. Contraction of the jet gives a lower volume flow than expected …

Objectives. This study addressed the hypothesis that at a constant peak flow rate, an
increasing heart rate could decrease the maximal apparent jet size by Doppler color flow …

Background: There is only limited knowledge on how the quantification of valvular
regurgitation by color Doppler is affected by changing blood viscosity. This study was …

Objectives. This study sought to evaluate the effect of proximal flow constraint induced by the
left ventricular wall on the accuracy of calculated flow rates and to assess a possible …