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A reduced order model formulation for left atrium flow: an atrial fibrillation case.

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Title: A reduced order model formulation for left atrium flow: an atrial fibrillation case.
Authors: Balzotti, Caterina1 (AUTHOR), Siena, Pierfrancesco1 (AUTHOR), Girfoglio, Michele1 (AUTHOR), Stabile, Giovanni2 (AUTHOR), Dueñas-Pamplona, Jorge3 (AUTHOR), Sierra-Pallares, José4 (AUTHOR), Amat-Santos, Ignacio4,5 (AUTHOR), Rozza, Gianluigi1 (AUTHOR) grozza@sissa.it
Source: Biomechanics & Modeling in Mechanobiology. Aug2024, Vol. 23 Issue 4, p1411-1429. 19p.
Subjects: Cardiac output, Blood flow, Atrial fibrillation, Left heart atrium, Blood testing, Blood viscosity
Abstract: A data-driven reduced order model (ROM) based on a proper orthogonal decomposition-radial basis function (POD-RBF) approach is adopted in this paper for the analysis of blood flow dynamics in a patient-specific case of atrial fibrillation (AF). The full order model (FOM) is represented by incompressible Navier–Stokes equations, discretized with a finite volume (FV) approach. Both the Newtonian and the Casson's constitutive laws are employed. The aim is to build a computational tool able to efficiently and accurately reconstruct the patterns of relevant hemodynamics indices related to the stasis of the blood in a physical parametrization framework including the cardiac output in the Newtonian case and also the plasma viscosity and the hematocrit in the non-Newtonian one. Many FOM-ROM comparisons are shown to analyze the performance of our approach as regards errors and computational speed-up. [ABSTRACT FROM AUTHOR]
Copyright of Biomechanics & Modeling in Mechanobiology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: A reduced order model formulation for left atrium flow: an atrial fibrillation case.
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  Data: <searchLink fieldCode="JN" term="%22Biomechanics+%26+Modeling+in+Mechanobiology%22">Biomechanics & Modeling in Mechanobiology</searchLink>. Aug2024, Vol. 23 Issue 4, p1411-1429. 19p.
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  Data: <searchLink fieldCode="DE" term="%22Cardiac+output%22">Cardiac output</searchLink><br /><searchLink fieldCode="DE" term="%22Blood+flow%22">Blood flow</searchLink><br /><searchLink fieldCode="DE" term="%22Atrial+fibrillation%22">Atrial fibrillation</searchLink><br /><searchLink fieldCode="DE" term="%22Left+heart+atrium%22">Left heart atrium</searchLink><br /><searchLink fieldCode="DE" term="%22Blood+testing%22">Blood testing</searchLink><br /><searchLink fieldCode="DE" term="%22Blood+viscosity%22">Blood viscosity</searchLink>
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  Data: A data-driven reduced order model (ROM) based on a proper orthogonal decomposition-radial basis function (POD-RBF) approach is adopted in this paper for the analysis of blood flow dynamics in a patient-specific case of atrial fibrillation (AF). The full order model (FOM) is represented by incompressible Navier–Stokes equations, discretized with a finite volume (FV) approach. Both the Newtonian and the Casson's constitutive laws are employed. The aim is to build a computational tool able to efficiently and accurately reconstruct the patterns of relevant hemodynamics indices related to the stasis of the blood in a physical parametrization framework including the cardiac output in the Newtonian case and also the plasma viscosity and the hematocrit in the non-Newtonian one. Many FOM-ROM comparisons are shown to analyze the performance of our approach as regards errors and computational speed-up. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Biomechanics & Modeling in Mechanobiology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – SubjectFull: Atrial fibrillation
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      – SubjectFull: Left heart atrium
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      – SubjectFull: Blood viscosity
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              Text: Aug2024
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