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Numerical Modeling of Intraventricular Flow during Diastole after Implantation of BMHV

Authors :
John Carson Allen
Fangsen Cui
Sangho Kim
Hui Qun Phang
Liang Zhong
Foad Kabinejadian
Gideon Praveen Kumar
Jimmy Kim Fatt Hon
Hwa Liang Leo
Ru San Tan
Boyang Su
Source :
PLoS ONE, Vol 10, Iss 5, p e0126315 (2015), PLoS ONE
Publication Year :
2015
Publisher :
Public Library of Science (PLoS), 2015.

Abstract

This work presents a numerical simulation of intraventricular flow after the implantation of a bileaflet mechanical heart valve at the mitral position. The left ventricle was simplified conceptually as a truncated prolate spheroid and its motion was prescribed based on that of a healthy subject. The rigid leaflet rotation was driven by the transmitral flow and hence the leaflet dynamics were solved using fluid-structure interaction approach. The simulation results showed that the bileaflet mechanical heart valve at the mitral position behaved similarly to that at the aortic position. Sudden area expansion near the aortic root initiated a clockwise anterior vortex, and the continuous injection of flow through the orifice resulted in further growth of the anterior vortex during diastole, which dominated the intraventricular flow. This flow feature is beneficial to preserving the flow momentum and redirecting the blood flow towards the aortic valve. To the best of our knowledge, this is the first attempt to numerically model intraventricular flow with the mechanical heart valve incorporated at the mitral position using a fluid-structure interaction approach. This study facilitates future patient-specific studies.

Details

Language :
English
ISSN :
19326203
Volume :
10
Issue :
5
Database :
OpenAIRE
Journal :
PLoS ONE
Accession number :
edsair.doi.dedup.....09d5c588738dc5832afa502576e7114f