Abstract
The overall performance of the left ventricle coupled to the arterial circulation is dependent on the intrinsic mechanical properties of the individual subsystems and their mutual interaction. The myocardium of the left ventricle is a viscoelastic material whose mechanical properties are reflected in the behavior of the ventricular chamber (i.e., the relationships among chamber pressure, volume, and flow). The relationship between instantaneous ventricular pressure and volume, analogous to the force-length relation of the cardiac muscle, has been described in terms of a time-varying volume elastance (Sagawa 1978; Suga, Sagawa, and Shoukas 1973). The role of ventricular elastance in determining the overall performance (e.g., stroke volume) of the left ventricle has been clearly established (Sunagawa, Sagawa, and Maughan 1984) and is presented in Chapter 10. Further, it has recently been shown that the left ventricle exhibits a viscouslike behavior that can be described in terms of the ventricular pressure-flow relation and, phenomenologically, can be represented as ventricular resistance (Hunter et al. 1979; Hunter et al. 1983; Ringo et al. 1982; Shroff, Janicki, and Weber 1983, 1985; Suga, Sagawa, and Demar 1980; Vaartjes, van Alste, and Boom 1982). This chapter focuses on the description of ventricular resistance and examines its role in determining the overall performance of the left ventricle coupled to the arterial circulation.
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Shroff, S.G., Janicki, J.S., Weber, K.T. (1987). Left Ventricular Systolic Resistance and Its Role in Coupling the Ventricle to the Arterial Circulation. In: Yin, F.C.P. (eds) Ventricular/Vascular Coupling. Springer, New York, NY. https://doi.org/10.1007/978-1-4613-8634-6_11
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DOI: https://doi.org/10.1007/978-1-4613-8634-6_11
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