Objectives. This study was designed lo examine the accuracy of proximal accelerating flow
calculations in estimating regurgitant flow rate or volume in patients with different types of …

Flow rate across an orifice can be determined from color Doppler echocardiographic maps
of the flow convergence region proximal to the orifice. Different methods have been …

OBJECTIVES.: The purpose of this study was to develop a rational and objective method for
selecting a region in the proximal flow field where the hemispheric formula for calculating …

In vitro studies have demonstrated that regurgitant flow rate can be estimated by the color
Doppler “proximal isovelocity surface area”(PISA) method. By applying the PISA method and …

BACKGROUND Imaging of the flow convergence region (FCR) proximal to a regurgitant
orifice has been shown to provide a method for quantifying the regurgitant flow rate …

Accurate quantitation of valvular incompetence remains an important goal in clinical
cardiology. It has been shown previously that when color flow Doppler mapping is used …

BACKGROUND The proximal flow convergence method, a quantitative color Doppler flow
technique, has been validated recently for calculating regurgitant flow and orifice area. We …

The proximal isovelocity surface area (PISA) method is accurate for quantitating mitral
regurgitation but requires recording both mitral maximal and integrated jet velocities using …

Objectives. This study was designed to assess the most accurate and reproducible methods
to quantitate mitral regurgitation by color flow trarasthoracic and transesophageal …

Doppler color flow mapping of a proximal isovelocity surface area (PISA), calculated from a
blue‐red aliasing radius, has been shown in vitro to be accurate for estimating volume flow …