Abstract
A structural model of the left ventricle is presented. It is a cylindricalthick-walled model composed of muscle fibre models and coronaryvessel models. The ventricular wall is divided in ten layers to accountfor the transmural variation of myofibre and coronary vessel orientation.These structures give the global performance of the ventricular modeldepending on their own behaviour and on the way they are interfaced.
The results refer both to the global ventricular performance and thebehaviour of the different components. In particular they suggest anappreciable contribute of the coronary capillary during the early fillingphase in enlarging the ventricle; during this phase the capillary vesselsexert an extensive force in the radial direction, due to inner coronarypressure, equal to 20--30 percent -- depending on the layer -- of the forceexerted by the fibres. This occurrence explains, in our opinion, theobserved cardiac function improvement when the arterial coronarypressure is increased, known as ’gardenhose‘ effect.
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REDAELLI, A., PIETRABISSA, R. A Structural Model of the Left Venricle Including Muscle Fibres and Coronary Vessels: Mechanical Behaviour in Normal Conditions. Meccanica 32, 53–70 (1997). https://doi.org/10.1023/A:1004229015882
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DOI: https://doi.org/10.1023/A:1004229015882