Intramural residual strain in canine left ventricle arrested in systole (relation between local strain distribution and histology)

Takashi Iyoda, Takeo Matsumoto, Teruo Kimura, Shigeru Arai, Masaaki Sato, Hiroyuki Abe

Research output: Contribution to journalArticlepeer-review

Abstract

Residual strain in a systolic heart was measured in equatorial ring like slices of canine left ventricles arrested in systole with barium. Global and two-dimensional local strains were computed from the deformation of each slice following its radial cutting. Global circumferential strain in the epicardial surface was 1.033 ± 0.037 (mean ± SD) and was significantly larger than that in the endocardial surface (0.985 ± 0.052), corresponding to opening-up of the ring like slice after the radial cutting. Local strain distribution through out the wall thickness differed from position to position and from specimen to specimen, although cumulative data showed that local circumferential strain was distributed similarly to the global strain. Histological observation showed that large tensile strain appeared preferentially in the area where myocardial fibers run in the circumferential direction and that the strain was generally compressive in other areas. The residual strain in the systolic heart may be closely correlated with the orientation of myocardial fibers.

Original languageEnglish
Pages (from-to)859-866
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Volume63
Issue number607
DOIs
Publication statusPublished - 1997

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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