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Structure‐based finite strain modelling of the human left ventricle in diastole
Author(s) -
Wang H. M.,
Gao H.,
Luo X. Y.,
Berry C.,
Griffith B. E.,
Ogden R. W.,
Wang T. J.
Publication year - 2013
Publication title -
international journal for numerical methods in biomedical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.741
H-Index - 63
eISSN - 2040-7947
pISSN - 2040-7939
DOI - 10.1002/cnm.2497
Subject(s) - ventricle , contractility , diastole , heart failure , cardiology , constitutive equation , medicine , finite element method , structural engineering , blood pressure , engineering
SUMMARY Finite strain analyses of the left ventricle provide important information on heart function and have the potential to provide insights into the biomechanics of myocardial contractility in health and disease. Systolic dysfunction is the most common cause of heart failure; however, abnormalities of diastolic function also contribute to heart failure, and are associated with conditions including left ventricular hypertrophy and diabetes. The clinical significance of diastolic abnormalities is less well understood than systolic dysfunction, and specific treatments are presently lacking. To obtain qualitative and quantitative information on heart function in diastole, we develop a three‐dimensional computational model of the human left ventricle that is derived from noninvasive imaging data. This anatomically realistic model has a rule‐based fibre structure and a structure‐based constitutive model. We investigate the sensitivity of this comprehensive model to small changes in the constitutive parameters and to changes in the fibre distribution. We make extensive comparisons between this model and similar models that employ different constitutive models, and we demonstrate qualitative and quantitative differences in stress and strain distributions for the different constitutive models. We also provide an initial validation of our model through comparisons to experimental data on stress and strain distributions in the left ventricle. Copyright © 2012 John Wiley & Sons, Ltd.