| Magnetic resonance planimetry of the vena contracta as a new approach to assessment of stenotic heart valves: an in vitro study. | |
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MedLine Citation:
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PMID: 11436211 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Exact determination of the orifice area in stenotic valve disease is essential to guide therapy. With the standard imaging methods, the orifice area has to be calculated by empirically-derived formulas, which may be susceptible to changes in hemodynamic status, leading to wrong therapeutic decisions. We tested the ability of magnetic resonance imaging (MRI) to quantify the orifice area by planimetry of the proximal vena contracta (PVC) in an idealized, constant-flow model in a 1.0-T tomograph (Siemens Magnetom Expert). There was a close correlation of the PVC area in MRI and the true orifice area (r2 = 0.985), and agreement of the methods as measured by the Bland-Altman test was significant with a low systematic error of -0.02 cm2. We conclude that MRI planimetry of the PVC in stenotic valves in a constant-flow model may be used to reliably measure the orifice area. |
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Authors:
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O Strohm; J Schulz-Menger; D Hänlein; R Dietz; M G Friedrich |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of magnetic resonance imaging : JMRI Volume: 14 ISSN: 1053-1807 ISO Abbreviation: J Magn Reson Imaging Publication Date: 2001 Jul |
Date Detail:
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Created Date: 2001-07-03 Completed Date: 2001-08-30 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9105850 Medline TA: J Magn Reson Imaging Country: United States |
Other Details:
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Languages: eng Pagination: 31-4 Citation Subset: IM |
Copyright Information:
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Copyright 2001 Wiley-Liss, Inc. |
Affiliation:
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Charité, Universitätsklinikum, Medizinische Fakultät der Humboldt-Universität, Franz-Volhard-Klinik am Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany. strohm@fvk-berlin.de |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Blood Flow Velocity
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physiology Calcinosis / diagnosis Constriction, Pathologic / diagnosis Heart Valve Diseases / diagnosis* Heart Valves / pathology Hemodynamics / physiology Humans Image Processing, Computer-Assisted* Magnetic Resonance Imaging* Models, Cardiovascular Numerical Analysis, Computer-Assisted* Phantoms, Imaging Reproducibility of Results Veins / pathology |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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