| Effects of a ventricular untwisting on intraventricular diastolic flow and color M-mode Doppler echocardiograms. | |
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MedLine Citation:
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PMID: 16055975 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Intraventricular hemodynamics during diastole was numerically analyzed in order to investigate effects of a ventricular untwisting on flow and a pattern of a color M-mode Doppler echocardiogram. Results showed that the ventricular untwisting affected secondary flows by inducing spiral flows in the ventricular cavity especially in the apical region. On the other hand, flows in the long-axis plane were not affected. Timing of formation, size and growing manner of the annular vortex were almost the same regardless of the presence of the ventricular untwisting; the vortex firstly arose in the base region, expanded towards the apex and eventually occupied the upper half of the ventricular cavity. A pattern of a color M-mode Doppler echocardiogram, that is, a spatiotemporal map of velocity along the long axis, was topologically the same as quantitatively confirmed by comparison of propagation velocity (0.43 m/s and 0.42 m/s for the case without and with the ventricular untwisting, respectively). These results suggested that this technique can exclusively capture flow dynamics produced by ventricular expansion with little influence of the ventricular untwisting. Therefore, we concluded that this is advantageous for assessing a left ventricular diastolic function. |
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Authors:
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Masanori Nakamura; Shigeo Wada; Takeshi Karino; Takami Yamaguchi |
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Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Technology and health care : official journal of the European Society for Engineering and Medicine Volume: 13 ISSN: 0928-7329 ISO Abbreviation: Technol Health Care Publication Date: 2005 |
Date Detail:
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Created Date: 2005-08-01 Completed Date: 2005-12-09 Revised Date: 2007-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9314590 Medline TA: Technol Health Care Country: Netherlands |
Other Details:
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Languages: eng Pagination: 269-80 Citation Subset: IM |
Affiliation:
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Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan. masanorin@pfsl.mech.tohoku.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Biomechanics Blood Pressure* Cardiac Output, Low / physiopathology Echocardiography, Doppler, Color* Heart Ventricles / anatomy & histology, physiopathology* Hemodynamics Humans Japan Myocardial Contraction / physiology |
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