Bileaflet prosthetic heart valve disease: Numerical approach using 3-D fluid-structure interaction model with realistic aortic root

Othman Smadi, Ibrahim Hassan, Philippe Pibarot, Lyes Kadem

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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).

Original languageEnglish
Title of host publicationASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010
Pages1901-1906
Number of pages6
EditionPARTS A, B AND C
DOIs
Publication statusPublished - 1 Dec 2010
Externally publishedYes
EventASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting, FEDSM 2010 Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels - Montreal, QC, Canada
Duration: 1 Aug 20105 Aug 2010

Publication series

NameAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
NumberPARTS A, B AND C
Volume1
ISSN (Print)0888-8116

Other

OtherASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting, FEDSM 2010 Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
CountryCanada
CityMontreal, QC
Period1/8/105/8/10

    Fingerprint

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Smadi, O., Hassan, I., Pibarot, P., & Kadem, L. (2010). Bileaflet prosthetic heart valve disease: Numerical approach using 3-D fluid-structure interaction model with realistic aortic root. In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010 (PARTS A, B AND C ed., pp. 1901-1906). (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM; Vol. 1, No. PARTS A, B AND C). https://doi.org/10.1115/FEDSM-ICNMM2010-31203