Calculation of pulsed Doppler left ventricular outflow tract regurgitant index for grading the severity of aortic regurgitation

Veyrat, C; Ameur, Adam; Gourtchiglouian, C.; Lessana, A; Abitbol, G; Kalmanson, D

doi:10.1016/0002-8703(84)90416-2

Cited by 38 publications

(7 citation statements)

References 19 publications

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“…Angio graphy (1) has been the standard clinical technique, but it is invasive, only semiquantitative, and involves radia tion exposure. A variety of echocardiographic and MRI techniques (2)(3)(4)(5)(6)(7)(8)(9)(10) have been studied recently to assess mitral regurgitation. They focused on the jet side of the regurgitant valve in an attempt to correlate the geomet rical parameters of the regurgitant jet in the left atrium with the severity of the disease.…”

mentioning

confidence: 99%

Quantification of mitral regurgitation with MR phase‐velocity mapping using a control volume method

Chatzimavroudis

Oshinski

Pettigrew

et al. 1998

Magnetic Resonance Imaging

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Reliable diagnosis and quantification of mitral regurgitation are important for patient management and for optimizing the time for surgery. Previous methods have often provided suboptimal results. The aim of this in vitro study was to evaluate MR phase‐velocity mapping in quantifying the mitral regurgitant volume (MRV) using a control volume (CV) method. A number of contiguous slices were acquired with all three velocity components measured. A CV was then selected, encompassing the regurgitant orifice. Mass conservation dictates that the net inflow into the CV should be equal to the regurgitant flow. Results showed that a CV, the boundary voxels of which excluded the region of flow acceleration and aliasing at the orifice, provided accurate measurements of the regurgitant flow. A smaller CV provided erroneous results because of flow acceleration and velocity aliasing close to the orifice. A large CV generally provided inaccurate results because of reduced velocity sensitivity far from the orifice. Aortic outflow, orifice shape, and valve geometry did not affect the accuracy of the CV measurements. The CV method is a promising approach to the problem of quantification of the MRV.

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mentioning

confidence: 99%

Quantification of mitral regurgitation with MR phase‐velocity mapping using a control volume method

Chatzimavroudis

Oshinski

Pettigrew

et al. 1998

Magnetic Resonance Imaging

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“…Cela s'appliquait aussi à l'insuffisance aortique. La mesure planimétrique de l'aire de signaux anormaux, détectés en mm² et correspondant à l'émergence du jet à l'orifice, était une méthode, cette fois, quantitative [17][18][19][20][21]. 4 Les premiers appareillages de ce type sont arrivés en France en 1983. unidimensionnelle à un vélocimètre ultrasonique à émission pulsée ( Figure 3A).…”

Section: Cb : Votre Dernier Article Paru En Mai 2015 [2] Figure Danunclassified

Une histoire de la recherche clinique en cardiologie

Veyrat¹,

Bruel²

2016

Med Sci (Paris)

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Il y a moins de cinquante ans, la détection par l’effet Doppler des sens antéro- et rétrogrades du courant sanguin appliquée à l’étude des flux cardiaques a été rendue possible par une petite équipe confidentielle, constituée en majeure partie de cardiologues cliniciens. Elle a révolutionné l’approche de la physiopathologie cardiovasculaire et imposé une nouvelle méthodologie d’examen répandue dans le monde entier. Sous la forme d’un entretien réalisé par le Dr Christiane Bruel, médecin général de santé publique, le Docteur Colette Veyrat, cardiologue, chargé de recherches honoraire au CNRS, ex-directeur du laboratoire d’Écho-Doppler, service de cardiologie de l’Hôpital Bicêtre, se souvient…

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“…It first led to quantifying the regurgitation on the basis of a three dimensional index, as already proposed for native regurgitant valves. '3 14 Satisfactory grading was obtained because the three dimensional approach took into account the unusual features of some jets such as wide annular jets with limited upstream spread. Furthermore, provided that the mapping was performed at the actual site of the mitral and aortic orifices, this approach identified the site of the dysfunction with the same reliability as that for native valves.…”

Section: Dysfunctioning Prosthesesmentioning

confidence: 99%

Valvar prosthetic dysfunction. Localisation and evaluation of the dysfunction using the Doppler technique.

Veyrat¹,

Witchitz²,

Lessana³

et al. 1985

Heart

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Thirty patients with 33 mitral or aortic prostheses or both were examined using the pulsed Doppler technique combined with cross sectional echocardiography to study the applicability of the Doppler technique in the diagnosis and evaluation of the severity of prosthetic dysfunction and to assess the ability of the mapping procedure to estimate the site and the size of the prosthetic defect. The dysfunction was valvar regurgitation in 29 instances and stenoses in eight, all of which were confirmed by invasive procedures. The severity of the dysfunction was graded on a three point scale. A control group of 73 subjects with 88 normal prostheses also underwent pulsed Doppler and cross sectional echocardiography. The pulsed Doppler study followed the usual procedure for a valvar disease including two and three dimensional mapping for regurgitation. Eight patients also underwent a continuous wave Doppler examination. The diagnostic reliability of the pulsed Doppler technique was greater than or equal to 90%. The severity of the dysfunction was accurately assessed in 86% of cases. In the case of aortic regurgitation, mapping of the jets was performed as easily for prostheses as for native regurgitant valves. In the case of mitral regurgitation, the mapping patterns depended on the cause of the dysfunction. With valvar tears, a jet was detected at the centre of the annulus, and with paravalvar leaks eccentric atrial jets were seen opposite the site of the leak. The pulsed Doppler and the surgical findings correlated well for both the site of the dysfunction (16/20 (80%) patients) and the size of the leak (13/16 (81%) patients). Thus, despite some limitations, pulsed Doppler and particularly the mapping procedure provide sufficient information to give an accurate non-invasive assessment of prosthetic valve dysfunction.

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Calculation of pulsed Doppler left ventricular outflow tract regurgitant index for grading the severity of aortic regurgitation

Cited by 38 publications

References 19 publications

Quantification of mitral regurgitation with MR phase‐velocity mapping using a control volume method

Quantification of mitral regurgitation with MR phase‐velocity mapping using a control volume method

Une histoire de la recherche clinique en cardiologie

Valvar prosthetic dysfunction. Localisation and evaluation of the dysfunction using the Doppler technique.

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