The dynamic capacitance of epicardial coronary arteries (i.d. ≥ 0.4 mm) in vivo was assessed from the volume stiffness and volume of these arteries. The volume stiffness was derived from the pressure wave front velocity as determined in dogs by measuring the delay time between the pressure pulses recorded proximal and distal to a segment of the anterior descending branch of the left coronary artery. The pressure pulse was generated elsewhere in the arterial system during diastole. The volume of the epicardial coronary arteries was calculated from the lengths and diameters as measured in araldite casts, making corrections for in-vitro/in-vivo differences in dimensions. The dynamic capacitance of the right coronary artery, and the anterior descending and circumflex branches of the left coronary artery at an arterial pressure of 13.3 kPa and a frequency between 7 and 30 Hz was found to be 0.0024 ± 0.0013, 0.0062 ± 0.0028 and 0.0079 ± 0.0035 mL/kPa (mean ± SD), respectively. The total capacitance of the epicardial coronary arteries was calculated to be (0.007 mL/kPa)/100 g, which is small as compared to the total capacitance of the coronary vasculature, including the intramyocardial compartment, which is in the order of (0.5 mL/kPa)/100g [1].
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February 1985
Research Papers
Dynamic Capacitance of Epicardial Coronary Arteries In Vivo
R. S. Reneman,
R. S. Reneman
Departments of Physiology and Biophysics, University of Limburg, Maastricht, The Netherlands
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T. Arts
T. Arts
Departments of Physiology and Biophysics, University of Limburg, Maastricht, The Netherlands
Search for other works by this author on:
R. S. Reneman
Departments of Physiology and Biophysics, University of Limburg, Maastricht, The Netherlands
T. Arts
Departments of Physiology and Biophysics, University of Limburg, Maastricht, The Netherlands
J Biomech Eng. Feb 1985, 107(1): 29-33 (5 pages)
Published Online: February 1, 1985
Article history
Received:
September 11, 1983
Revised:
February 25, 1984
Online:
June 15, 2009
Citation
Reneman, R. S., and Arts, T. (February 1, 1985). "Dynamic Capacitance of Epicardial Coronary Arteries In Vivo." ASME. J Biomech Eng. February 1985; 107(1): 29–33. https://doi.org/10.1115/1.3138515
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