A coupled mitral valve-left ventricle model with fluid-structure interaction.
A coupled mitral valve-left ventricle model with fluid-structure interaction.
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DOI:
10.1016/j.medengphy.2017.06.042
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发表时间:
2017-09
影响因子:
2.2
通讯作者:
Luo X
中科院分区:
文献类型:
--
作者:
Gao H;Feng L;Qi N;Berry C;Griffith BE;Luo X
Understanding the interaction between the valves and walls of the heart is important in assessing and subsequently treating heart dysfunction. This study presents an integrated model of the mitral valve (MV) coupled to the left ventricle (LV), with the geometry derived from in vivo clinical magnetic resonance images. Numerical simulations using this coupled MV-LV model are developed using an immersed boundary/finite element method. The model incorporates detailed valvular features, left ventricular contraction, nonlinear soft tissue mechanics, and fluid-mediated interactions between the MV and LV wall. We use the model to simulate cardiac function from diastole to systole. Numerically predicted LV pump function agrees well with in vivo data of the imaged healthy volunteer, including the peak aortic flow rate, the systolic ejection duration, and the LV ejection fraction. In vivo MV dynamics are qualitatively captured. We further demonstrate that the diastolic filling pressure increases significantly with impaired myocardial active relaxation to maintain a normal cardiac output. This is consistent with clinical observations. The coupled model has the potential to advance our fundamental knowledge of mechanisms underlying MV-LV interaction, and help in risk stratification and optimisation of therapies for heart diseases.
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影响因子:
2.4
作者:
Chen WW;Gao H;Luo XY;Hill NA
通讯作者:
Hill NA
影响因子:
2.2
作者:
Lau, K. D.;Diaz, V.;Scambler, P.;Burriesci, G.
通讯作者:
Burriesci, G.
DOI:
10.1002/cnm.2691
发表时间:
2014-12
影响因子:
2.1
作者:
Gao H;Ma X;Qi N;Berry C;Griffith BE;Luo X
通讯作者:
Luo X
DOI:
10.1002/cnm.2652
发表时间:
2014-11
影响因子:
2.1
作者:
Gao H;Wang H;Berry C;Luo X;Griffith BE
通讯作者:
Griffith BE
DOI:
10.1002/cnm.2858
发表时间:
2017-10
影响因子:
2.1
作者:
Gao H;Qi N;Feng L;Ma X;Danton M;Berry C;Luo X
通讯作者:
Luo X