Results 21 to 30 of about 6,306,409 (152)

Large-Scale Particle Image Velocimetry for Estimating Vena-Contracta Width for Flow in Contracted Open Channels

, 2020
This paper presents the findings of a flume study using large-scale particle velocimetry (LSPIV) to estimate the top-width of the vena contracta formed by an approach open-channel flow entering a contraction of the channel. LSPIV is an image-based method
Alireza Fakhri, Alireza Nowroozpour, Robert Ettema, Fatemeh Aliyari   +3 more
core   +1 more source

Real-Time Three-Dimensional Echocardiographic Assessment of Severity of Mitral Regurgitation Using Proximal Isovelocity Surface Area and Vena Contracta Area Method. Lessons We Learned and Clinical Implications [PDF]

, 2015
# The Author(s) 2015. This article is published with open access at Springerlink.com Abstract Mitral regurgitation (MR) is considered the most common valve disease with a prevalence of 2–3 % of signif-icant regurgitation (moderate to severe and severe ...
Björn Plicht, Thomas Buck
core   +1 more source

Real‐Time 3‐Dimensional Echocardiographic Assessment of Effective Regurgitant Orifice Area in Dogs With Myxomatous Mitral Valve Disease

Journal of Veterinary Internal Medicine, 2017
Background Effective regurgitant orifice area (EROA), calculated from the vena contracta width (VCW) as the narrowest portion of the proximal regurgitant jet, might be used to estimate severity of mitral regurgitation. However, this simplified assumption
A. Tidholm, A. Bodegård‐Westling, K. Höglund, J. Häggström, I. Ljungvall   +4 more
doaj   +1 more source

Tricuspid annular dynamics, not diameter, predicts tricuspid regurgitation after mitral valve surgery: Results from a prospective randomized trialCentral MessagePerspective

JTCVS Open, 2023
Objective: Current guidelines advise using prophylactic tricuspid valve annuloplasty during mitral valve surgery, especially in the presence of annular diameter enlargement.
Matteo Pettinari, MD, Laurent De Kerchove, MD, PhD, Michel Van Dyck, PhD, Agnes Pasquet, MD, PhD, Bernhard Gerber, MD, PhD, Gebrine El-Khoury, MD, Jean-Louis Vanoverschelde, MD, PhD   +6 more
doaj   +1 more source

Effect of the valve design on pressure drop, pressure recovery, and spatial positioning of vena contracta

, 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
Lucherini F., Redaelli A., Antona C., Jaworek M., Romagnoni C., Vismara R., Tasca G.   +6 more
core   +1 more source

Use of discriminant analysis based on echocardiography for classification of congestive heart failure in dogs with myxomatous mitral valve disease

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2014
Mixomatous mitral valve disease (MMVD) is one of the most common cardiac abnormalities in dogs and humans that can lead to cardiac heart failure (CHF).
A.C. Silva, R.A.L. Muzzi, L.A.L. Muzzi, D.F. Ferreira, G. Oberlender, M.S. Oliveira, R.B. Nogueira, L.B. Ticle   +7 more
doaj   +1 more source

Tricuspid Regurgitation in Acute Heart Failure: Predicting Outcome Using Novel Quantitative Echocardiography Techniques

Diagnostics, 2022
Background: The prognostic impact of tricuspid regurgitation (TR) in acute heart failure (AHF) remains uncertain. Methods: We retrospectively assessed 418 consecutive AHF patients who underwent comprehensive echocardiographic assessment within 24 h of ...
Max Berrill, Eshan Ashcroft, David Fluck, Isaac John, Ian Beeton, Pankaj Sharma, Aigul Baltabaeva   +6 more
doaj   +1 more source

Estimated parameters at the vena-contracta for an annual discharge.

, 2015
Estimated parameters at the vena-contracta for an annual discharge.
H. C. Dai (828847), T. F. Hu (828849), H. Q. Zhang (828846), B. H. Yuan (828848), J. Q. Mao (828845)   +4 more
core   +1 more source

Estimated parameters at the vena-contracta for a once-in-three-year flood event.

, 2015
Estimated parameters at the vena-contracta for a once-in-three-year flood event.
H. C. Dai (828847), T. F. Hu (828849), H. Q. Zhang (828846), B. H. Yuan (828848), J. Q. Mao (828845)   +4 more
core   +1 more source

The Paradox of the Vena Contracta

, 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.
R. G. Teyssandier, M. P. Wilson
core   +1 more source