Advanced modeling strategy for the analysis of heart valve leaflet tissue mechanics using high-order finite element method

Mohammadi, Hadi; Bahramian, Fereshteh; Wan, Wankei

doi:10.1016/j.medengphy.2009.07.012

Cited by 38 publications

(33 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The role of valves is acritical component inproviding the proper direction for the flow of blood through the heart and thereafter. All of the valves, in normal physiological condition, perform as unidirectional check-valves thatallow blood to flow in only one direction (i.e., from one chamber to another, or letting blood flow to the lungs or to the systemic circulation of body in only one direction) [24]. The valves control the direction and the rate of the blood flow through the heart in a timely manner by opening and closing the leaflets during diastolic and systolic phases.…”

Section: Review Human Heart Valvesmentioning

confidence: 99%

“…The mechanism by which valves open and close during the cardiac cycle is known to be almost passive as the pressure gradient before and after the valves is the driving force. This pressure gradient is generated within the heart and highly depends on the compliance of the heart and arteries [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. However,in the mitral valve, the opening and closing phases are not completely passive as the papillary muscles and the chordae tendineaelocated within the left ventricle partly contribute, as mentioned before.…”

Section: Review Human Heart Valvesmentioning

confidence: 99%

“…This allows blood flow from the left atrium into the left ventricle, (2) once the left atrium contracts, more blood flows into the left ventricle, and (3) when the left ventricle contracts again, the mitral valve closes and the aortic valve opens, and blood flows into the aorta [24][25][26][27].…”

Section: Review Human Heart Valvesmentioning

confidence: 99%

“…44.3C is a constant thatis assumed to be 0.1 for the aortic valve. In this formula,the unit of time is min, the unit of length is cm, delta P is the pressure drop across the valve with the unit of mmHg [21][22][23][24][25][26][27][28][29][30][31][32].…”

Section: Indication For Replacement Surgerymentioning

confidence: 99%

See 3 more Smart Citations

Prosthetic Aortic Heart Valves

Mohammadi¹,

Fradet²

2017

Cardio Vasc Syst

Self Cite

View full text Add to dashboard Cite

In this review, the anatomy and structure of the aortic valve and its prostheses are comprehensively discussed. Cardiac anatomy and function, human heart valves and their prostheses are also extensively discussed. The current status of prosthetic heart valves along with the next generation of these devices is broadly deliberated. Ather promising options such astranscatheter technologies (percutaneous valves), minimally invasive techniques, and the construction of prosthetic valves using tissue engineering as futureristic areas of research are brought into conclusion.

show abstract

Section: Review Human Heart Valvesmentioning

confidence: 99%

Section: Review Human Heart Valvesmentioning

confidence: 99%

Section: Review Human Heart Valvesmentioning

confidence: 99%

Section: Indication For Replacement Surgerymentioning

confidence: 99%

See 2 more Smart Citations

Prosthetic Aortic Heart Valves

Mohammadi¹,

Fradet²

2017

Cardio Vasc Syst

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hoje, o método tem sido utilizado com sucesso em outras aplicações, como em análises de fluido-estrutura [34,128,164], biomecânica [163,180], estudos acústicos [147], interações de partículas subatômicas [190], entre outras.…”

Section: O Método Dos Elementos Finitos Em Análise Estruturalunclassified

Um programa de elementos finitos em GPU e orientado a objetos para análise dinâmica não linear de estruturas.

Yamassaki¹

View full text Add to dashboard Cite

A Deus, minha mãe, meu irmão e minhas plantas (!) vii AgradecimentosPrimeiramente, agradeço a Deus pela grande ajuda em tornar este trabalho realidade. Em seguida, duas pessoas foram meus grandes mentores e exemplos que ouvi e segui durante todo este tempo: minha mãe, Amélia, e meu irmão, Ricardo. Durante o doutorado, mesmo quando eu me perdia em devaneios sobre a arquitetura do programa ou contava sobre as ideias malucas que tinha, eles sempre ouviam atentamente, sendo as pessoas com quem mais compartilhei as alegrias e tristezas ao longo do processo. Amélia e Ricardo, muito obrigado por tudo! Recebi bastante apoio dos meus colegas no GMSIE, o Grupo de Mecâ-nica dos Sólidos e Impacto em Estruturas. Seguem agradecimentos especiais para Rafael Santiago, Rafael Moura, Roberto Oshiro, Leonardo Mazzariol e Miguel Gonzales, pela paciência e oferecerem boas ideias, além de explicar não-linearidade para um não-engenheiro.Seguem também agradecimentos à Profa. Larissa Driemeier, pelas explicações iniciais em não-linearidade, e ao Prof. Marco Lúcio Bittencourt, pelas valiosas discussões. E, é claro, não podia faltar agradecimentos ao meu orientador, o Prof. Marcílio Alves, que me ofereceu esta grande oportunidade, para um aluno de computação e me apoiou enquanto eu desvendava a área de Engenharia. Por último, agradeço à CAPES pelo financiamento concedido e à Escola Politécnica e à Universidade de São Paulo, pelo oferecimento das instalações onde foi realizado o trabalho.Fui excêntrico ao dedicar este trabalho às minhas plantas. O estresse que sofri por causa da demanda por resultados quase me abalou física e mentalmente. Cultivar plantas foi o que me garantiu dias menos estressantes, se tornando uma verdadeira terapia. Aliás, para esclarecer, alguns nomes dos componentes da arquitetura do programa aqui discutido são nomes de plantas que cultivo. ABSTRACTIt has been recognized that the adoption of graphics processing units (GPU) can significantly boost numerical methods in scientific applications. In order to support such technology, it is necessary to readapt the program, which requires code flexibility. In this work, it is presented the architecture of a finite element (FEM) analysis program for structural analysis with GPU support. Object-oriented design is used to guide development and to build code into a flexible structure. Program scalability is achieved by extensibility of its features, provided by run-time loaded components. In order to demonstrate code robustness, the software is directed to the study of structural dynamics, considering complex non-linear aspects of material (plasticity) and geometry (large displacements). Code accuracy is checked by comparing with known literature problems and with commercial solver packages (ABAQUS). The comparison shows good agreement in the results. The GPU code speedup is analysed against timings of CPU program code, where it is observed performance gain up to 10 times.

show abstract