Myocardium-blood composite model for quantification of regional ventricular contraction

Y. C. Pao, E. L. Ritman

Research output: Contribution to conferencePaper

1 Scopus citations

Abstract

Computational methods are proposed for quantifying the regional ventricular myocardium contraction during the systolic phase of a cardiac cycle. Eight implanted markers have been used as vertices to identify a hexahedral region. The regional volume changes are calculated via a finite-element partitioning technique and using the the video-roentgenographically recorded three-dimensional coordinates of the markers. Spline curve-fit of the volume data consequently enables the myocardial contraction to be quantified. A dog heart under controlled condition and under the influence of selected drugs have been studied. Effect of signal noise in the displacement data on the calculated values of hexahedral volume and regional myocardial contraction have also been examined. Statistically significant differences in transienut decrease about 5-15% of regional wall volume during the early phase of systole under various conditions of aortic pressure, heart rate, and inotropism are demonstrable, but no changes in the rate of volume decrease are detected. To further improve the quantification, a 20-marker region which facilitates isoparametric finite element analysis and a modified myocardium-blood composite model are proposed.

Original languageEnglish (US)
Pages371-385
Number of pages15
StatePublished - Dec 1 1988
EventComputational Methods in Bioengineering - Chicago, IL, USA
Duration: Nov 27 1988Dec 2 1988

Other

OtherComputational Methods in Bioengineering
CityChicago, IL, USA
Period11/27/8812/2/88

ASJC Scopus subject areas

  • Engineering(all)

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    Pao, Y. C., & Ritman, E. L. (1988). Myocardium-blood composite model for quantification of regional ventricular contraction. 371-385. Paper presented at Computational Methods in Bioengineering, Chicago, IL, USA, .