Mitral Prosthesis Opening and Flow Dynamics in a Model of Left Ventricle: An In Vitro Study on a Monoleaflet Mechanical Valve
| Autor: | Frederic Mouret, Jean G. Dumesnil, Lyes Kadem, Eric Bertrand, Philippe Pibarot, Regis Rieu |
|---|---|
| Přispěvatelé: | Institut de Recherche sur les Phénomènes Hors Equilibre (IRPHE), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-École Centrale de Marseille (ECM), PROTOMED, Quebec Heart Institute/Laval Hospital, Université Laval [Québec] (ULaval)-Quebec Heart Institute, Aix Marseille Université (AMU)-École Centrale de Marseille (ECM)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2005 |
| Předmět: |
[SPI.OTHER]Engineering Sciences [physics]/Other
medicine.medical_specialty mitral valve prostheses 0206 medical engineering valve implantation 02 engineering and technology Inflow 030204 cardiovascular system & hematology 03 medical and health sciences 0302 clinical medicine Internal medicine particle image velocimetry medicine Physics Transplantation Cardiac cycle General Medicine 020601 biomedical engineering Vortex Pulse (physics) cardiovascular simulator medicine.anatomical_structure Particle image velocimetry Flow (mathematics) Ventricle Cardiology Surgery Cardiology and Cardiovascular Medicine Body orifice |
| Zdroj: | Cardiovascular Engineering Cardiovascular Engineering, Springer Verlag, 2005, 5, n°1, pp.13-20. ⟨10.1007/s10558-005-3069-5⟩ Cardiovascular Engineering, 2005, 5, n°1, pp.13-20. ⟨10.1007/s10558-005-3069-5⟩ |
| ISSN: | 1573-6806 1567-8822 |
| DOI: | 10.1007/s10558-005-3069-5 |
| Popis: | A complete understanding of the flow past a mitral valve prosthesis require a new generation of pulse duplicators and more realistic flow conditions. The objective of this study is to describe the opening kinetics of a monoleaflet Medtronic Hall 27-mm mechanical valve in mitral position and to determine the flow pattern within the left ventricle using particle image velocimetry (PIV) for different instants during the cardiac cycle. At the onset of diastolic phase, the flow goes through the major orifice and then through the minor orifice. The two jets generated induce two counterclockwise vortices within the ventricle, which can lead to a partial closure of the valve during mitral E wave deceleration. During diastasis and mitral A wave, only one vortex persists in the ventricle and pushes the valve disk backward at the end of the diastolic phase. The valve disc never reached its maximum opening (65∘ vs.75∘). This study underscores that the flow past a monoleaflet valve in mitral position is highly dependent on the complex interaction between the inflow, the vortices development within the left ventricle, and the gravity. Such a complex interaction can only be highlighted using new generation of pulse duplicators. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink