Results 171 to 180 of about 3,618 (199)
Journal of the American College of Cardiology, 1995 Objectives.We attempted to determine the accuracy and pitfalls of calculating the mitral regurgitant orifice area with the proximal isovelocity surface area method in a clinical series that included patients with valvular prolapse and eccentric jets ...
Maurice Enriquez-Sarano +2 more
exaly +2 more sources
Anatomical Regurgitant Orifice Detection and Quantification from 3-D Echocardiographic Images [PDF]
Ultrasound in Medicine and Biology, 2017 The vena contracta and effective regurgitant orifice area (EROA) are currently used for the clinical assessment of mitral regurgitation (MR) from 2-D color Doppler imaging.
MIGUEL Sotaquirá +2 more
exaly +2 more sources
Journal of the American College of Cardiology, 2008 ObjectivesThis study sought to determine the effect of dynamic variations of mitral regurgitant flow rate (MRFR) and effective regurgitant orifice area (EROA) on mitral regurgitant stroke volume (MRSV) quantification using 4 different single-point and ...
Thomas Buck +2 more
exaly +2 more sources
Journal of the American Society of Echocardiography, 2018 Background: Mitral regurgitation (MR) and elevated pulmonary artery pressure are common findings in patients with aortic valve stenosis (AS). The pathophysiologic role of quantitatively defined MR as a determinant of pulmonary hypertension (PH) is ...
Giovanni Benfari +2 more
exaly +2 more sources
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Echocardiography, 2021
AbstractPurposeMechanisms leading to heart failure (HF) symptoms in aortic valve stenosis (AS) are contentious. We examined the impact of secondary mitral regurgitation (MR) on the symptomatic status in patients with AS.MethodsOutpatients performing echocardiography with any degree of AS, without organic mitral valve disease, mitral valve intervention,
Caterina Maffeis +4 more
openaire +3 more sources
AbstractPurposeMechanisms leading to heart failure (HF) symptoms in aortic valve stenosis (AS) are contentious. We examined the impact of secondary mitral regurgitation (MR) on the symptomatic status in patients with AS.MethodsOutpatients performing echocardiography with any degree of AS, without organic mitral valve disease, mitral valve intervention,
Caterina Maffeis +4 more
openaire +3 more sources
Journal of Biomechanics, 2000
The velocity fields of turbulent jets can be described using a single formula which includes two empirical constants: k(core) determining the length of the central core and k(turb) the jet widening. Flow models simulating jet adhesion, confinement and noncircular orifices were studied using laser Doppler anemometer and the modifications of the ...
B, Diebold +5 more
openaire +2 more sources
The velocity fields of turbulent jets can be described using a single formula which includes two empirical constants: k(core) determining the length of the central core and k(turb) the jet widening. Flow models simulating jet adhesion, confinement and noncircular orifices were studied using laser Doppler anemometer and the modifications of the ...
B, Diebold +5 more
openaire +2 more sources
Angiology, 2000
The authors measured the aortic regurgitant orifice area (ROA) using Doppler echocar diography and attempted to clarify how important the ROA is in determining the regur gitant volume (RV) in 22 patients with chronic aortic regurgitation (AR).
K, Mizushige +3 more
openaire +2 more sources
The authors measured the aortic regurgitant orifice area (ROA) using Doppler echocar diography and attempted to clarify how important the ROA is in determining the regur gitant volume (RV) in 22 patients with chronic aortic regurgitation (AR).
K, Mizushige +3 more
openaire +2 more sources
Echocardiography, 2018
IntroductionMitral regurgitation severity assessment is usually carried out using qualitative, semiquantitative, and quantitative parameters. The mitral valve navigation (MVN) tool allows to measure the mitral effective regurgitant orifice (MERO) from 3D echo datasets. Our aim was to validate the MVN as a new tool to quantify MERO.
Sandra L. Gonzalez Navarrete +14 more
openaire +2 more sources
IntroductionMitral regurgitation severity assessment is usually carried out using qualitative, semiquantitative, and quantitative parameters. The mitral valve navigation (MVN) tool allows to measure the mitral effective regurgitant orifice (MERO) from 3D echo datasets. Our aim was to validate the MVN as a new tool to quantify MERO.
Sandra L. Gonzalez Navarrete +14 more
openaire +2 more sources
Circulation, 2022
Introduction: The proximal isovelocity surface area (PISA) method has been validated for quantifying severity of mitral regurgitation (MR) in orifices with circular geometry. However, functional MR often has an elliptical orifice, which alters the proximal isovelocity contour from a hemisphere to a hemi-ellipsoid.
Waqas Hanif +10 more
openaire +1 more source
Introduction: The proximal isovelocity surface area (PISA) method has been validated for quantifying severity of mitral regurgitation (MR) in orifices with circular geometry. However, functional MR often has an elliptical orifice, which alters the proximal isovelocity contour from a hemisphere to a hemi-ellipsoid.
Waqas Hanif +10 more
openaire +1 more source