Active and Passive Changes in the Characteristic Impedance of the Proximal Aorta

  • Jean-Pierre L. Dujardin
  • Dana N. Stone


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).


Volume Expansion Characteristic Impedance Aortic Pressure Flow Probe Circulate Blood Volume 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Arndt, J.O., Stegall, H.F., Wicke, H.J., 1971, Mechanics of the aorta in vivo. A radiographic approach, Circ. Res., 28: 693.PubMedCrossRefGoogle Scholar
  2. Cox, R.H., 1975, Pressure dependence of the mechanical properties of arteries in vivo, Am. J. Physiol., 229: 1371.PubMedGoogle Scholar
  3. 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.PubMedGoogle Scholar
  4. 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.PubMedGoogle Scholar
  5. Kenner, T., 1971, Dynamic control of flow and pressure in the circulation, Kybernetik, 9: 215.PubMedCrossRefGoogle Scholar
  6. 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.Google Scholar
  7. Peterson, L.H., 1954, The dynamics of pulsatile blood flow, Circ. Res., 2: 127.PubMedCrossRefGoogle Scholar
  8. 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.PubMedGoogle Scholar
  9. 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.Google Scholar
  10. 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.PubMedCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1982

Authors and Affiliations

  • Jean-Pierre L. Dujardin
    • 1
  • Dana N. Stone
    • 1
  1. 1.Department of PhysiologyThe Ohio State UniversityColumbusUSA

Personalised recommendations