Surgical replacement, in the incidence of severely diseased heart valve, is vital in order to restore the normal heart function. Every year around 280,000 valve replacements occur around the world, half of them are bileaflet mechanical heart valves (BMHVs). Despite the remarkable improvement in valve design resulting in minimizing prosthetic valve complications (thromboembolic events or pannus formation), these complications are still possible with BMHV Implantation. As a consequence, an obstruction in one or both MHV leaflets could happen and threaten the patient life. In the present study, an obstructed bileaflet MHV with different percentages of malfunction was simulated assuming 3-D fluid structure interaction (FSI) adapting k-w turbulence as a robust model for the transitional flow using 2.5 million elements and creating a realistic aortic root model with three sinuses. Velocity contours for different percentages of malfunction were compared mainly at B-datum plane and the perpendicular plane to the B-Datum. Also, the development of coherent structures was investigated. Clinically, the maximum pressure gradients were estimated by mimicking the Echo Doppler assumptions (using the simplified Bernoulli equation).
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ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
August 1–5, 2010
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4948-4
PROCEEDINGS PAPER
Bileaflet Prosthetic Heart Valve Disease: Numerical Approach Using 3-D Fluid-Structure Interaction Model With Realistic Aortic Root Available to Purchase
Othman Smadi,
Othman Smadi
Concordia University, Montreal, QC, Canada
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Ibrahim Hassan,
Ibrahim Hassan
Concordia University, Montreal, QC, Canada
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Philippe Pibarot,
Philippe Pibarot
Universite´ Laval, Que´bec, QC, Canada
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Lyes Kadem
Lyes Kadem
Concordia University, Montreal, QC, Canada
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Othman Smadi
Concordia University, Montreal, QC, Canada
Ibrahim Hassan
Concordia University, Montreal, QC, Canada
Philippe Pibarot
Universite´ Laval, Que´bec, QC, Canada
Lyes Kadem
Concordia University, Montreal, QC, Canada
Paper No:
FEDSM-ICNMM2010-31203, pp. 1901-1906; 6 pages
Published Online:
March 1, 2011
Citation
Smadi, O, Hassan, I, Pibarot, P, & Kadem, L. "Bileaflet Prosthetic Heart Valve Disease: Numerical Approach Using 3-D Fluid-Structure Interaction Model With Realistic Aortic Root." Proceedings of the ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels. ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting: Volume 1, Symposia – Parts A, B, and C. Montreal, Quebec, Canada. August 1–5, 2010. pp. 1901-1906. ASME. https://doi.org/10.1115/FEDSM-ICNMM2010-31203
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