Comparison between Doppler echocardiography and hot-film anemometry in measuring the turbulent shear stress downstream of artificial mitral valves: a methodological study / 中华医学杂志(英文版)
Chinese Medical Journal
; (24): 2174-2178, 2013.
Article
ي En
| WPRIM
| ID: wpr-273016
المكتبة المسؤولة:
WPRO
ABSTRACT
<p><b>BACKGROUND</b>Turbulent shear stress (TSS) plays an important role in the research of fluid dynamics of heart valves. This study aimed to perform a quantitative study of TSS downstream of porcine artificial mitral valves in order to verify the correlation of hot-film anemometry (HFA) and Doppler echocardiography combined with computer-aided image analysis for the detection of TSS.</p><p><b>METHODS</b>A porcine model of mitral valve replacement was established. HFA and Doppler ultrasound techniques were used to directly and indirectly measure TSS-relevant parameters of the artificial mitral valve following different mitral valve replacements different approaches were used to reserve the subvalvular apparatus of the mitral valve. A correlation analysis was then carried out.</p><p><b>RESULTS</b>There was a significant correlation between the HFA and Doppler ultrasound combined with computer-aided image analysis of the TSS at the same time and at the same site. No significant difference was found in the TSS measured by the two methods.</p><p><b>CONCLUSIONS</b>Compared with HFA, Doppler echocardiography combined with computer-aided image analysis is a safe, non-invasive, and real-time method that enables accurate and quantitative detection of TSS downstream in vivo, objectively reflecting the flow field downstream of the artificial mitral valve. Doppler ultrasound combined with computer-aided image analysis can be employed for quantitatively evaluating the downstream hemodynamic performance of the mitral valve.</p>
النص الكامل:
1
الفهرس:
WPRIM
الموضوع الرئيسي:
Rheology
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Stress, Mechanical
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General Surgery
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Swine
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Image Processing, Computer-Assisted
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Pulsatile Flow
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Heart Valve Prosthesis
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Diagnostic Imaging
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Echocardiography, Doppler
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Methods
نوع الدراسة:
Diagnostic_studies
المحددات:
Animals
اللغة:
En
مجلة:
Chinese Medical Journal
السنة:
2013
نوع:
Article