Repository of Research and Investigative Information

Repository of Research and Investigative Information

Baqiyatallah University of Medical Sciences

Numerical method to measure velocity integration, stroke volume and cardiac output while rest: Using 2D fluid-solid interaction model

(2014) Numerical method to measure velocity integration, stroke volume and cardiac output while rest: Using 2D fluid-solid interaction model. Engineering Solid Mechanics. pp. 91-100. ISSN 22918744 (ISSN)

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Abstract

Development of knowledge of cardiovascular diseases and treatments strongly depends on understanding of hemodynamic measurements. Hemodynamic parameters, therefore, have been investigated using simulation-based methods. A two-dimensional model was applied for seven healthy subjects with echo-Doppler at rest. Echocardiography imaging was also utilized to gain the geometry of the aortic valve. Fluid-Structure Interaction (FSI) model was carried out, coupling an Arbitrary Lagrangian-Eulerian mesh. Pressure loads were used as boundary conditions on the valve’s ventricular and aortic sides. Pressure loads used were the calculated brachial pressures plus differences between brachial, central and left ventricular pressures. The FSI model predicted the velocity integration, stroke volume and cardiac output over a range of heart rates while rest. Numerical results generally had a difference of 5.4 to 15.87 with Doppler results. Linear correlations between numerical and clinical approaches have been applied. This makes possible predictions achieved from the FSI model to be gained which are highly accurate (e.g. correlation factor r = 0.995, 0.990 and 0.990 for velocity integration, stroke volume and cardiac output, respectively). The obtained numerical results showed that numerical methods can be combined with clinical measurements to provide good estimates of patient specific hemodynamics for different subjects. © 2014 Growing Science Ltd. All rights reserved.

Item Type: Article
Keywords: Echo-Doppler flow Fluid-structure interaction Hemodynamics Natural aortic valve
Divisions:
Page Range: pp. 91-100
Journal or Publication Title: Engineering Solid Mechanics
Journal Index: Scopus
Volume: 2
Number: 2
Identification Number: https://doi.org/10.5267/j.esm.2014.2.002
ISSN: 22918744 (ISSN)
Depositing User: مهندس مهدی شریفی
URI: http://eprints.bmsu.ac.ir/id/eprint/90

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