Quantification of mitral regurgitation with MR phase-velocity mapping using a control volume method
نویسندگان
چکیده
منابع مشابه
Quantification of Mitral Regurgitation
Background. In clinical color Doppler examinations, mitral regurgitant jets are often observed to impinge on the left atrial wall immediately beyond the mitral valve. In accordance with fluid dynamics theory, we hypothesized that a jet impinging on a wall would lose momentum more rapidly, undergo spatial distortion, and thus have a different observed jet area from that of a free jet with an ide...
متن کاملSlice location dependence of aortic regurgitation measurements with MR phase velocity mapping.
Although several methods have been used clinically to assess aortic regurgitation (AR), there is no "gold standard" for regurgitant volume measurement. Magnetic resonance phase velocity mapping (PVM) can be used for noninvasive blood flow measurements. To evaluate the accuracy of PVM in quantifying AR with a single imaging slice in the ascending aorta, in vitro experiments were performed by usi...
متن کاملEvaluation of diastolic blood flow dynamic of the left ventricle in dogs with mitral valve regurgitation using vector flow mapping
Mitral valve regurgitation (MVR) is a common valvular disease in dogs. Hydrokinetic evaluation of the blood flow within the ventricles has become possible by vector flow mapping (VFM), which shows the blood flow within the ventricles in vector and vortex flows. Blood flow within the left ventricle of MVR dogs was compared at different stages of MVR and to that of normal dogs. 14 normal dogs and...
متن کاملQuantification of mitral regurgitation with amplitude-weighted mean velocity from continuous wave Doppler spectra.
Amplitude-weighted mean velocity from continuous wave (CW) Doppler spectra was used to measure aortic flow (QAo) and left ventricular mitral inflow (QLVin). These flows were used to quantify mitral regurgitation fraction: RFm = (QLVin-QAo).QLVin-1.100(%).QLVin was calculated from the diastolic time integral of amplitude-weighted mean velocity that was derived from CW spectra with the transducer...
متن کاملQuantification of Aortic and Mitral Regurgitation Using Heart Motion Adapted Cine Phase Contrast Flow Measurements
Introduction Chronic aortic and mitral regurgitation place an additional hemodynamic load on the left ventricle (LV). Substantial LV chamber dilation, as assessed with echocardiographic techniques, is commonly used as an indirect marker of volume overload. However, for asymptomatic and minimally symptomatic patients the direct measure of regurgitant volume would be the key parameter for patient...
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ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 1998
ISSN: 1053-1807,1522-2586
DOI: 10.1002/jmri.1880080310