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A structural model of the left ventricle including muscle fibres and coronary vessels: Mechanical behaviour in normal conditions. (English) Zbl 0874.92007
Summary: A structural model of the left ventricle is presented. It is a cylindrical thick-walled model composed of muscle fibre models and coronary vessel models. The ventricular wall is divided in ten layers to account for the transmural variation of myofibre and coronary vessel orientation. These structures give the global performance of the ventricular model depending on their own behaviour and on the way they are interfaced.
The results refer both to the global ventricular performance and the behaviour of the different components. In particular, they suggest an appreciable contribute of the coronary capillary during the early filling phase in enlarging the ventricle; during this phase the capillary vessels exert an extensive force in the radial direction, due to inner coronary pressure, equal to 20-30 percent – depending on the layer – of the force exerted by the fibres. This occurrence explains, in our opinion, the observed cardiac function improvement when the arterial coronary pressure is increased, known as ‘gardenhose’ effect.

92C10 Biomechanics
92C50 Medical applications (general)
92C35 Physiological flow
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