3D localization of vena contracta using Doppler ICE imaging in tricuspid valve interventions. [PDF]
Int J Comput Assist Radiol Surg, 2022 Abstract Purpose Tricuspid valve (TV) interventions face the challenge of imaging the anatomy and tools because of the ‘TEE-unfriendly’ nature of the TV. In edge-to-edge TV repair, a core step is to position the clip perpendicular to the coaptation gap. In this study, we provide a semi-automated method to localize the VC
Nisar H +4 more
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The Paradox of the Vena Contracta
Journal of Fluids Engineering, 1975 The preponderance of evidence, both theoretical and experimental, appears to show that the vena contracta does not occur at the same location as the minimum pressure point in the Reynolds number range greater than 10,000. Fortunately, however, this result has little effect on the measurement engineer in the field.
M. P. Wilson, R. G. Teyssandier
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Revista Colombiana de Cardiología, 2016 Objetivo: Establecer la correlación y la concordancia del grado de severidad de insuficiencia pulmonar entre la ecocardiografía y la resonancia magnética en la población pediátrica de un hospital de tercer nivel de atención.
Perla Roxana Aguilar-Segura +5 more
doaj +2 more sources
On Nonuniform Flow Characteristics at the Vena Contracta
Journal of Basic Engineering, 1970 The kinetic energy correction factor for the flow at the vena contracta is calculated using experimental data and a modified Bernoulli equation. Based on an assumption of similarity of the profiles upstream and downstream of an orifice, two other nonuniformity factors, the momentum correction factor and the ratio of average velocity to center-line ...
Hassan S. Ghazi
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Assessment of Mitral Regurgitation Severity by Doppler Color Flow Mapping of the Vena Contracta in Dogs [PDF]
Journal of Veterinary Internal Medicine, 2014 Abstract Background Quantitative and semiquantitative methods have been proposed for the assessment of MR severity, and though all are associated with limitations. Measurement of vena contracta width (VCW) has been used in clinical practice.
Elisa Sala +2 more
exaly +6 more sources
The International Journal of Artificial Organs, 2020 Background: Bioprostheses are complex structures and yield a very complex fluid dynamics. Hence, it can be hypothesized that prosthesis structural characteristics affect the position of the vena contracta and, consequently, influences the pattern and the extent of pressure recovery downstream from the vena ...
Tasca G. +6 more
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Quantification of rheumatic mitral stenosis severity with three‐dimensional vena contracta area [PDF]
Echocardiography, 2018 IntroductionRheumatic mitral stenosis (MS) is an important health issue in developing countries. Assessment of the correct mitral valve area (MVA) is essential for the timing of intervention. Most of the parameters for the assessment of rheumatic MS are derived from Two‐dimensional (2D) echocardiography.
Gülay Gök, Tufan Çınar, Nurten Sayar
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Three-Dimensional Transesophageal Echocardiographic Vena Contracta Area for Grading Mitral Regurgitation: Severity Cut-offs From a Prospective Tunisian Cohort. [PDF]
EchocardiographyThree‐dimensional vena contracta area (VCA) measured by transoesophageal echocardiography enables precise accurate quantification of mitral regurgitation severity. In a Tunisian cohort, 3D VCA showed strong correlations with conventional 2D indices and excellent diagnostic performance for severe MR, supporting its use particularly in rheumatic mitral ...
Messaoudi Y +3 more
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Comparison of biplanar- with 3D-vena contracta and vena contracta area for the assessment of tricuspid valve regurgitation by intraoperative transesophageal echocardiography. [PDF]
Ann Cardiothorac SurgSingh R +5 more
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Diagnostic Value of 3D Transesophageal Vena Contracta Area versus 2D Echocardiographic Assessment of Secondary Mitral Regurgitation. [PDF]
EchocardiographyBackground Secondary mitral regurgitation (MR) is associated with substantial cardiovascular morbidity and mortality, making accurate severity assessment essential for clinical management.
Diab RA, Zaki ER, Elhalawany BAE.
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