| Pitfalls in Doppler evaluation of diastolic function: insights from 3-dimensional magnetic resonance imaging. | |
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MedLine Citation:
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PMID: 10511650 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Ultrasound-Doppler assessment of diastolic function is subject to velocity errors caused by angle sensitivity and a fixed location of the sample volume. We used 3-dimensional phase contrast magnetic resonance imaging (MRI) to evaluate these errors in 10 patients with hypertension and in 10 healthy volunteers. The single (Doppler) and triple (MRI) component velocity was measured at early (E) and late (A) inflow along Doppler-like sample lines or 3-dimensional particle traces generated from the MRI data. Doppler measurements underestimated MRI velocities by 9.4% +/- 8.6%; the effect on the E/A ratio was larger and more variable. Measuring early and late diastolic inflows from a single line demonstrated the error caused by their 3-dimensional spatial offset. Both errors were minimized by calculating the E/A ratio from maximal E and A values without constraint to a single line. Alignment and spatial offset are important sources of error in Doppler diastolic parameters. Improved accuracy may be achieved with the use of maximal E and A velocities from wherever they occur in the left ventricle. |
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Authors:
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A Fyrenius; L Wigström; A F Bolger; T Ebbers; K P Ohman; M Karlsson; B Wranne; J Engvall |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography Volume: 12 ISSN: 0894-7317 ISO Abbreviation: J Am Soc Echocardiogr Publication Date: 1999 Oct |
Date Detail:
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Created Date: 1999-11-30 Completed Date: 1999-11-30 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 8801388 Medline TA: J Am Soc Echocardiogr Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 817-26 Citation Subset: IM |
Affiliation:
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Departments of Medicine and Care, Biomedical Engineering, Linköping University, Linköping, Sweden. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Chi-Square Distribution Diastole / physiology* Echocardiography, Doppler, Color* Female Humans Hypertension / physiopathology* Image Processing, Computer-Assisted Magnetic Resonance Imaging* Male Middle Aged Myocardial Contraction |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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