Effect of pericardial pressure on the left ventricular expansion in diastasis. A simulation using finite element analysis

G. Han*, K. B. Chandran, M. Vonesh, N. Gotteiner, D. McPherson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A method including finite element analysis and optimization on the reconstructed geometry of the left ventricle is employed to assess the myocardial material properties during diastasis. The three-dimensional reconstruction of the geometry at various times during the passive expansion phase is obtained from cross-sectional echocardiographic images. A step-wise linear analysis is employed to assess the non-linear myocardial elastic properties during diastasis. In this paper, a method is presented to simulate the effect of the surrounding structures such as the RV and the pericardial sac on the passive expansion of the ventricular chamber. By initially restricting the nodes on the epicardial surface from motion, the resultant nodal reaction force normal to the surface is computed using finite element analysis. Summing the normal reaction forces of all the nodes on the epicardial surface and normalizing the net reaction force with the epicardial surface area, an 'equivalent pericardial pressure' is computed and applied for subsequent finite element analysis. The results demonstrate that equivalent pericardial pressure is smaller in magnitude compared with the corresponding ventricular chamber pressure. The computed pericardial pressure is also observed to increase with the ventricular chamber pressure and behaves similar to the right ventricular pressure. The importance of the inclusion of the pericardial pressure in the assessment of the ventricular expansion during diastasis has been demonstrated in this work.

Original languageEnglish (US)
Title of host publication1991 Advances in Bioengineering
PublisherPubl by ASME
Pages219-222
Number of pages4
Volume20
ISBN (Print)0791808890
StatePublished - Dec 1 1991
EventWinter Annual Meeting of the American Society of Mechanical Engineers - Atlanta, GA, USA
Duration: Dec 1 1991Dec 6 1991

Other

OtherWinter Annual Meeting of the American Society of Mechanical Engineers
CityAtlanta, GA, USA
Period12/1/9112/6/91

ASJC Scopus subject areas

  • Engineering(all)

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