Results 111 to 120 of about 48,338 (205)

Estimating the Haemodynamic Streamline Vena Contracta as the Effective Orifice Area Measured from Reconstructed Multislice Phase-contrast MR Images for Patients with Moderately Accelerated Aortic Stenosis. [PDF]

Magn Reson Med Sci, 2022
Hohri Y, Itatani K, Matsuo A, Komori Y, Okamoto T, Goto T, Kobayashi T, Hiramatsu T, Miyazaki S, Nishino T, Yaku H.   +10 more
europepmc   +1 more source

Novel 3-dimensional effective regurgitation orifice area quantification serves as a reliable tool to identify severe mitral valve regurgitation

Scientific Reports
A precise quantification of mitral regurgitation (MR) severity is essential for treatment and outcome of patients with MR. 3D echocardiography facilitates estimation of MR but selection of patients with necessity of invasive treatment remains challenging.
Tobias Harm, Frederic-Joaquim Schwarz, Monika Zdanyte, Andreas Goldschmied, Livia Baas, Parwez Aidery, Serhii Shcherbyna, Ioannis Toskas, Timea Keller, Isabela Kast, Juergen Schreieck, Tobias Geisler, Meinrad Paul Gawaz, Karin Anne Lydia Mueller   +13 more
doaj   +1 more source

Thermoplastic Labyrinth Seals Under Rub Impact: Deformation Leakage Mechanisms and High Efficiency Optimization

Lubricants
Labyrinth seals, extensively used in aerospace and turbomachinery as non-contact sealing devices, undergo accelerated wear and enhanced leakage due to repeated rub-impact between rotating shafts and sealing rings.
Fei Ma, Zhengze Yang, Yue Liu, Shuangfu Suo, Peng Su   +4 more
doaj   +1 more source

Quantifizierung von Mitralinsuffizienz unter Verwendung von Color flow Doppler und Baseline shift [PDF]

, 2017
Vena contracta width (VCW) and effective regurgitant orifice area (EROA) are well established methods for evaluating mitral regurgitation using transesophageal echocardiography (TEE).
Heß, Hannah Maria Ursula
core   +2 more sources

Ponera contracta

1. Ponera contracta. Pl. VI. figs. 9-12. B.M. Formica contracta, Latr. Hist. Nat. Fourm. 195. t. 7. f. 40. Fabr. Syst. Piez. 410. 58. Ponera contracta, Latr. Gen. Crust, et Ins. iv. 128. St. Farg. Hym. i. 195. 8. Steph. Ill. Brit. Ent. Supp. 15.
Smith, F.
core   +2 more sources

Understanding the Asymmetrical Vena Contracta Area

JACC: Cardiovascular Imaging, 2013
Buck, Thomas, Plicht, Björn, Kahlert, Philipp, Erbel, Raimund   +3 more
openaire   +4 more sources

Mitral Valve Vena Contracta Area [PDF]

, 2020
openaire   +1 more source

Study of Flow and Thrust in Nozzle-Flapper Valves

, 1975
The Navier-Stokes equations and the equation of continuity describing the flow in the flat-faced nozzle-flapper valve are numerically solved by the iterative relaxation method and the effect of the flow contraction (vena contracta) occurring in the ...
S. Hayashi, T. Ito, T. Matsui
core   +1 more source

In vivo fluid dynamics of the Ventura interatrial shunt device in patients with heart failure

ESC Heart Failure
Aims Interatrial shunts are under evaluation as a treatment for heart failure (HF); however, their in vivo flow performance has not been quantitatively studied. We aimed to investigate the fluid dynamics properties of the 0.51 cm orifice diameter Ventura
Michael Pfeiffer, John Boehmer, John Gorcsan, Shunsuke Eguchi, Yoshiyuki Orihara, Michal Laufer Perl, Neal Eigler, William T. Abraham, Julio Nuñez Villota, Elizabeth Lee, Antoni Bayés‐Genís, Gil Moravsky, Saibal Kar, Michael R. Zile, Richard Holcomb, Stefan D. Anker, Gregg W. Stone, Josep Rodés‐Cabau, JoAnn Lindenfeld, Jeroen J. Bax   +19 more
doaj   +1 more source

Aortic Valve Vena Contracta Width [PDF]

, 2020
openaire   +1 more source