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 …

The visualization and quantification of intracardiac blood flow have always been a
challenging task for the cardiologist. The advent of color Doppler flow imaging substantially …

Assessment of the severity of mitral regurgitation (MR) by Doppler color flow mapping is
limited by dependence of jet area on hemodynamic and technical variables. The width of the …

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 …

A computer algorithm has been developed for segmentation and three-dimensional (3D)
reconstruction of Doppler color-flow images. The algorithm enables the user to select a …

To investigate which factors influence visual evaluation and how accurate it is in patients
with valvular insufficiency, 83 patients were studied. All were in sinus rhythm, 43 with mitral …

The narrowest central flow region of a jet is defined as the vena contracta. This term is
applied also to the contracted zone of the Doppler color flow image of a jet at its passage …

Recent studies have attempted to predict the severity of regurgitant lesions from jet size on
Doppler flow maps. Jet size is a function of both regurgitant volume and fluid entrained from …

Doppler evaluation of mitral regurgitation remains difficult; thus, a head-to-head comparison
of the diagnostic accuracy of Doppler methods was undertaken. Fifty patients with native …

Early studies using Doppler color flow imaging have suggested that measurement of the
regurgitant jet area provides information regarding the severity of valvular insufficiency. This …