Summary
There has been no consensus concerning the particular movement of the valvular plane of the heart (VPM). As shown in this study involving a mathematical model based upon the momentum equation and experiments on a specially designed artificial heart pump, the VPM not only results from the shortening of the heart, but also from blood flow within the heart and large blood vessels, from the forces caused by the muscle movements, and from the elastic properties of the heart's suspension. The results of the calculations and the experiments confirm the effect of the so-called valve mechanism and its influence on the economic beating action of the heart.
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Krasny, R., Kammermeier, H. & Köhler, J. Biomechanics of valvular plane displacement of the heart. Basic Res Cardiol 86, 572–581 (1991). https://doi.org/10.1007/BF02190708
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DOI: https://doi.org/10.1007/BF02190708