Abstract
It has been shown earlier that volume expansion causes a change in the activity of the aortic smooth muscle (Dujardin et al., 1980a). After increasing the circulating blood volume by 30%, the aortic diameter D at a given pressure P (e.g. 125 kdyne/cm2) was increased by 6.6% while dP/dD was decreased by 14.6%. Using formula (1), which relates the characteristic impedance of the proximal aorta (ZC) to the aortic P-D relationship, a decrease in ZC at a given pressure would be predicted (ρ is the density of the blood).
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References
Arndt, J.O., Stegall, H.F., Wicke, H.J., 1971, Mechanics of the aorta in vivo. A radiographic approach, Circ. Res., 28: 693.
Cox, R.H., 1975, Pressure dependence of the mechanical properties of arteries in vivo, Am. J. Physiol., 229: 1371.
Dujardin, J-P.L., Paul, L.T., Pieper, H.P., 1980a, Effect of acute volume loading on aortic smooth muscle activity in intact dogs, Am. J. Physiol., 238: H379.
Dujardin, J-P.L., Stone, D.N., Paul, L.T., Pieper, H.P., 1980b, Response of systemic arterial input impedance to volume expansion and hemorrhage, Am. J. Physiol., 238: H902.
Kenner, T., 1971, Dynamic control of flow and pressure in the circulation, Kybernetik, 9: 215.
Kenner, T., 1979, Physical and mathematical modeling in cardiovascular systems, in: “Quantitative cardiovascular studies”, N.H.C. Hwang, D.R. Gross and D.J. Patel, ed., University Park Press, Baltimore.
Peterson, L.H., 1954, The dynamics of pulsatile blood flow, Circ. Res., 2: 127.
Pieper, H.P., Leverett, S.D., 1964, Evaluation by dye dilution of the pressure-slope method for peripheral run-off, J. Appl. Physiol., 19: 353.
Stone, D.N., Dujardin, J-P.L., 1979, The characteristic impedance of the proximal aorta studied in the time and frequency domain, Fed. Proc., 38: 1035.
Taylor, M.G., 1966, Use of random excitation and spectral analysis in the study of frequency dependent parameters of the cardiovascular system. Circ. Res., 18: 585.
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© 1982 Springer Science+Business Media New York
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Dujardin, JP.L., Stone, D.N. (1982). Active and Passive Changes in the Characteristic Impedance of the Proximal Aorta. In: Kenner, T., Busse, R., Hinghofer-Szalkay, H. (eds) Cardiovascular System Dynamics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-6693-3_20
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DOI: https://doi.org/10.1007/978-1-4899-6693-3_20
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