Haemodynamic of blood flow through stenotic aortic valve
| Autor: | Mahdi Navidbakhsh, Fatemeh Sadeghpour, Nasser Fatouraee |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Aortic valve
medicine.medical_specialty Materials science Finite Element Analysis 0206 medical engineering Biomedical Engineering Mean pressure Hemodynamics 02 engineering and technology 030204 cardiovascular system & hematology 03 medical and health sciences 0302 clinical medicine Internal medicine medicine Shear stress Humans Computer Simulation Systole Models Cardiovascular Calcinosis Aortic Valve Stenosis General Medicine Blood flow medicine.disease 020601 biomedical engineering Stenosis medicine.anatomical_structure Aortic Valve Calcium content Cardiology Blood Flow Velocity |
| Zdroj: | Journal of Medical Engineering & Technology. 41:108-114 |
| ISSN: | 1464-522X 0309-1902 |
| DOI: | 10.1080/03091902.2016.1226439 |
| Popis: | Aortic valve (AV) stenosis is described as the deposition of calcium within the valve leaflets. With the growth of stenosis, haemodynamic, mechanical performances of the AV and blood flow through the valve are changed. In this study, we proposed two fluid–structure interaction (FSI) finite element (FE) models. The hyperelastic material model was considered for leaflets tissue. The leaflet tissue was considered stiffer in stenotic valve than the healthy leaflets because of its calcium content. Therefore, the valve could not open completely and this led to a decrease in the orifice area of the valve. The orifice area decreased from 2.4 cm2 for the healthy AV to 1.4 cm2 for the stenosis case. Mean pressure gradient increased in mid systole and the axial velocity experienced a three times increment in magnitude. Higher blood shear stress magnitudes were observed in stenotic valve due to the structure of the leaflet. In addition, strain concentration and higher stress values were observed on the leafle... |
| Databáze: | OpenAIRE |
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