Results 11 to 20 of about 5,766,879 (155)

Evaluation of effective regurgitant orifice area of mitral valvular regurgitation by multislice cardiac computed tomography [PDF]

Journal of Cardiology, 2010
The purpose of our study was to assess the diagnostic accuracy of multislice computed tomography (MSCT) for the identification and quantification of mitral valve regurgitation in comparison with transthoracic echocardiography (TTE).Twenty-six patients (15 females, 11 males with a mean age of 44.6±14.1 years) who were in follow-up with the diagnosis of ...
Vural, Murat, Ucar, Ozgul, Celebi, Ozlem Ozcan, Cicekcioglu, Hulya, Durmaz, Hasan Ali, Selvi, N. Alper, Koparal, Suha, Aydogdu, Sinan   +7 more
openaire   +3 more sources

Effective aortic regurgitant orifice area: Description of a method based on the conservation of mass

Journal of the American College of Cardiology, 1991
The natural history of aortic regurgitation is incompletely understood in part because of the lack of a simple method to estimate the defect size. A method of determining the effective regurgitant orifice area that combines Doppler catheter and Doppler echocardiographic techniques and is based on the principle of conservation of mass (the continuity ...
Reimold, Sharon C., Ganz, Peter, Bittl, John A., Thomas, James D., Thoreau, David, Plappert, Theodore J., Lee, Richard T.   +6 more
openaire   +3 more sources

Three-Dimensional Transesophageal Echocardiographic Vena Contracta Area for Grading Mitral Regurgitation: Severity Cut-offs From a Prospective Tunisian Cohort. [PDF]

Echocardiography
Three‐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, El Bechir D, Ghadhab A, Latifa M.   +3 more
europepmc   +2 more sources

Bicuspid aortic valve regurgitation: Quantification of anatomic regurgitant orifice area by 3D transesophageal echocardiography reconstruction [PDF]

, 2008
Bicuspid aortic valve regurgitation: quantification of anatomic regurgitant orifice area by 3D transesophageal echocardiography ...
Maria Grazia Modena, Modena, Maria Grazia, Barbieri, Andrea, Alessandro Malagoli, Malagoli, Alessandro, Andrea Barbieri   +5 more
core   +1 more source

An orifice shape-based reduced order model of patient-specific mitral valve regurgitation [PDF]

, 2021
Mitral valve regurgitation (MR) is one of the most prevalent valvular heart diseases. Its quantitative assessment is challenging but crucial for treatment decisions.
F. Hellmeier (11870312), A. Meyer (3922958), G. Archer (11870324), L. Goubergrits (7314044), I. Waechter-Stehle (11870309), J. Weese (3585935), J. Kempfert (11870321), M. Kelm (11870318), K. Czechowicz (11870306), J. Franz (11870303), R. Hose (11870327), F. Razafindrazaka (11870315), T. Kuehne (11870330)   +12 more
core   +2 more sources

A novel fully automated method for mitral regurgitant orifice area quantification [PDF]

, 2011
Background: Effective regurgitant orifice area (EROA) in mitral regurgitation (MR) is difficult to quantify. Clinically it is measured using the proximal isovelocity surface area (PISA) method, which is intrinsically not automatable, because it requires ...
Hughes, AD, Willson, K, Moraldo, M, Davies, JE, Bergamini, C, Pabari, PA, Manisty, C, Malaweera, ASN, Dhutia, NM, Xu, XY, Baruah, R, Francis, DP   +11 more
core   +2 more sources

Bend and orifice plate interactions and their influence on the pressure losses in internal flow systems [PDF]

, 1980
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.Experimental work has been carried out with a hydraulic flow test rig in which flows of water up to 65 kgs-l can be measured with a weigh-tank and its ...
Salvarli, Huseyin
core   +6 more sources

Estimation of Regurgitant Volume and Orifice in Aortic Regurgitation Combining CW Doppler and Parameter Estimation in a Windkessel Like Model [PDF]

, 1991
A method for noninvasive estimation of regurgitant orifice and volume in aortic regurgitation is proposed and tested in anaesthesized open chested pigs. The method can be used with noninvasive measurement of regurgitant jet velocity with continuous wave ...
S.O. Samstad, Bjørn A.J. Angelsen, J.E. Solbakken, H. Torp, D.T. Linker, S.A. Slørdahl, H. Piene   +6 more
core   +1 more source

Dynamic aspects of acute mitral regurgitation: effects of ventricular volume, pressure and contractility on the effective regurgitant orifice area. [PDF]

Circulation, 1979
The dynamics of acute mitral regurgitation were studied in six open-chest dogs in whom a portion of the anterior leaflet was excised. Phasic mitral and aortic flows were measured electromagnetically and left ventricular filling volume, regurgitant volume (RV) and forward stroke volume (SV) were calculated.
C, Yoran, E L, Yellin, R M, Becker, S, Gabbay, R W, Frater, E H, Sonnenblick   +5 more
openaire   +2 more sources

Performance assessment of prosthetic heart valves using orifice area formulae and the energy index method [PDF]

, 1993
Valve function is commonly assessed by effective orifice area (EOA) estimates using equations derived from conservation of mass and energy. Errors have been found with the method due to difficulties in determining the valve’s coefficient of discharge (Cd)
Souza Campos, Flavio Ballerini
core   +1 more source