L. POPESCU*^#, MARIA PUȘCHIȚA**

*Biophysics and Medical Physics, “Vasile Goldiș” West University, 94, Revoluției St., Arad, Romania
**Internal Medicine, “Vasile Goldiș” West University, 94, Revoluției St., Arad, Romania

We will define in this paper a measure for the way of filling of the human heart left
ventricle having in background the elastic behaviour of the myocardium. We will note this measure as
the elasticity coefficient and the calculation formula will be deduced from energetic consideration.
Relied on basic heart and blood flow mechanics, a mathematical formula for elasticity coefficient was
defined. The formula includes usual parameters: blood density, left ventricle longitudinal dimension,
ejection fraction, blood speed through the mitral valve during E wave. By analyzing new elasticity
coefficient values (k) across a cohort of 2977 patients we observed that E/A ratio (the ration of blood
speed in E and A wave, respectively) and k have the same trendline with age. This can be an
indication that k can define myocardium activity, but for a validation of this new parameter further
studies have to be made.
Key words: Elastic coefficient, myocardium.

Corresponding author’s e-mail: luchian.popescu@gmail.com

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