| Evaluation of mitral stenosis with velocity-encoded cine-magnetic resonance imaging. | |
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MedLine Citation:
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PMID: 7856529 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Velocity-encoded cine-magnetic resonance imaging (VEC-MRI) is a new method for quantitation of blood flow with the potential to measure high-velocity jets across stenotic valves. The objective of this study was to evaluate the ability of VEC-MRI to measure transmitral velocity in patients with mitral stenosis. Sixteen patients with known mitral stenosis were studied. A 1.5 Tesla superconducting magnet was used to obtain velocity-encoded images in the left ventricular short-axis plane. Images were obtained throughout the cardiac cycle at 3 consecutive slices beginning proximal to the mitral coaptation point. To determine the optimal slice thickness for MRI imaging, both 10 mm and 5 mm thicknesses were used. Echocardiography including continuous-wave Doppler was performed on every patient within 2 hours of MRI imaging. Peak velocity was determined for both VEC-MRI and Doppler-echo images. Two observers independently measured the VEC-MRI mitral inflow velocities. Of the 16 patients, imaged data were incomplete in only 1 study, and all images were adequate for analysis. Strong correlations were found for measurements of mitral valve gradient for both 10 mm (peak r = 0.89, mean r = 0.84) and 5 mm (peak r = 0.82, mean r = 0.95) slice thicknesses. Measurements of peak velocity with VEC-MRI (10 mm) agreed well with Doppler: mean 1.46 m/s, mean of differences (Doppler MRI) 0.38 m/s, standard deviation of differences 0.2 m/s. These findings suggest that VEC-MRI can noninvasively determine the severity of mitral stenosis. |
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Authors:
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P A Heidenreich; J Steffens; N Fujita; M O'Sullivan; G R Caputo; E Foster; C B Higgins |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: The American journal of cardiology Volume: 75 ISSN: 0002-9149 ISO Abbreviation: Am. J. Cardiol. Publication Date: 1995 Feb |
Date Detail:
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Created Date: 1995-03-14 Completed Date: 1995-03-14 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 0207277 Medline TA: Am J Cardiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 365-9 Citation Subset: AIM; IM |
Affiliation:
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Department of Radiology, University of California, San Francisco 94142-0628. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Atrial Fibrillation / complications Blood Flow Velocity Echocardiography, Doppler Female Humans Magnetic Resonance Imaging / methods* Male Middle Aged Mitral Valve Stenosis / complications, diagnosis*, physiopathology*, ultrasonography |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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