Model of Left Ventricular Contraction: Validation Criteria and Boundary Conditions
Computational models of cardiac contraction can provide critical insight into cardiac function and dysfunction. A necessary step before employing these computational models is their validation. Here we propose a series of validation criteria based on left ventricular (LV) global (ejection fraction a...
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Published in | Functional Imaging and Modeling of the Heart Vol. 11504; pp. 294 - 303 |
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Main Authors | , , , , , |
Format | Book Chapter Journal Article |
Language | English |
Published |
Switzerland
Springer International Publishing AG
01.01.2019
Springer International Publishing |
Series | Lecture Notes in Computer Science |
Subjects | |
Online Access | Get full text |
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Abstract | Computational models of cardiac contraction can provide critical insight into cardiac function and dysfunction. A necessary step before employing these computational models is their validation. Here we propose a series of validation criteria based on left ventricular (LV) global (ejection fraction and twist) and local (strains in a cylindrical coordinate system, aggregate cardiomyocyte shortening, and low myocardial compressibility) MRI measures to characterize LV motion and deformation during contraction. These validation criteria are used to evaluate an LV finite element model built from subject-specific anatomy and aggregate cardiomyocyte orientations reconstructed from diffusion tensor MRI. We emphasize the key role of the simulation boundary conditions in approaching the physiologically correct motion and strains during contraction. We conclude by comparing the global and local validation criteria measures obtained using two different boundary conditions: the first constraining the LV base and the second taking into account the presence of the pericardium, which leads to greatly improved motion and deformation. |
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AbstractList | Computational models of cardiac contraction can provide critical insight into cardiac function and dysfunction. A necessary step before employing these computational models is their validation. Here we propose a series of validation criteria based on left ventricular (LV) global (ejection fraction and twist) and local (strains in a cylindrical coordinate system, aggregate cardiomyocyte shortening, and low myocardial compressibility) MRI measures to characterize LV motion and deformation during contraction. These validation criteria are used to evaluate an LV finite element model built from subject-specific anatomy and aggregate cardiomyocyte orientations reconstructed from diffusion tensor MRI. We emphasize the key role of the simulation boundary conditions in approaching the physiologically correct motion and strains during contraction. We conclude by comparing the global and local validation criteria measures obtained using two different boundary conditions: the first constraining the LV base and the second taking into account the presence of the pericardium, which leads to greatly improved motion and deformation. |
Author | Garfinkel, Alan Verzhbinsky, Ilya A. Eldredge, Jeff D. Ennis, Daniel B. Ponnaluri, Aditya V. S. Perotti, Luigi E. |
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BackLink | https://www.ncbi.nlm.nih.gov/pubmed/31231721$$D View this record in MEDLINE/PubMed |
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Notes | The research reported in this publication was supported by NIH/NHLBI K25-HL135408 and R01-HL131823 grants, and UCLA URSP. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. |
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PublicationSubtitle | 10th International Conference, FIMH 2019, Bordeaux, France, June 6-8, 2019, Proceedings |
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Title | Model of Left Ventricular Contraction: Validation Criteria and Boundary Conditions |
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