Analysis of rat papillary muscle transverse deformation by laser diffraction

We use laser diffraction in the analysis of the transversal deformation that the papillary muscle of the female and male Wistar rat may undergo when is subjected to different tension (tension range, 0-30 mN) in the longitudinal plane. Papillary muscles from the right ventricle were illuminated at no...

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Bibliographic Details
Published in:General physiology and biophysics 2010-06, Vol.29 (2), p.129-133
Main Authors: Virgen-Ortiz, Adolfo, Apolinar-Iribe, Alejandro, Ríos-Martínez, Martín E, Marín, José L, Muñiz, Jesús
Format: Article
Language:English
Subjects:
Animals
Biomechanical Phenomena
Excitation Contraction Coupling - physiology
Female
In Vitro Techniques
Lasers
Male
Myocardial Contraction - physiology
Papillary Muscles - physiology
Rats
Rats, Wistar
Stress, Mechanical
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Summary:We use laser diffraction in the analysis of the transversal deformation that the papillary muscle of the female and male Wistar rat may undergo when is subjected to different tension (tension range, 0-30 mN) in the longitudinal plane. Papillary muscles from the right ventricle were illuminated at normal incidence with a He-Ne laser lasing at 594 nm at room temperature. The far-field diffraction pattern projected to a screen was recorded with a digital camera for its analysis. The analysis of the stress-strain curves from the two experimental groups shows that the papillary muscles from male rats exhibit a higher stiffness in the transversal axis compared to the female rats.
ISSN:0231-5882
DOI:10.4149/gpb_2010_02_129