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Versteeg PG, Noble MI, Stubbs J, et al. The effect of cardiac denervation and beta-blockade on control of cardiac output in exercising dogs. Eur J Appl Physiol Occup Physiol. 1983;52(1):62-8doi: 10.1007/BF00429027.
Versteeg, P. G., Noble, M. I., Stubbs, J., & Elzinga, G. (1983). The effect of cardiac denervation and beta-blockade on control of cardiac output in exercising dogs. European journal of applied physiology and occupational physiology, 52(1), 62-8. https://doi.org/10.1007/BF00429027
Versteeg, P G, et al. "The effect of cardiac denervation and beta-blockade on control of cardiac output in exercising dogs." European journal of applied physiology and occupational physiology vol. 52,1 (1983): 62-8. doi: https://doi.org/10.1007/BF00429027
Versteeg PG, Noble MI, Stubbs J, Elzinga G. The effect of cardiac denervation and beta-blockade on control of cardiac output in exercising dogs. Eur J Appl Physiol Occup Physiol. 1983;52(1):62-8. doi: 10.1007/BF00429027. PMID: 6686131.
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Eur J Appl Physiol Occup Physiol. 1983;52(1):62-8. doi: 10.1007/BF00429027.

The effect of cardiac denervation and beta-blockade on control of cardiac output in exercising dogs.

European journal of applied physiology and occupational physiology

P G Versteeg, M I Noble, J Stubbs, G Elzinga

PMID: 6686131 DOI: 10.1007/BF00429027

Abstract

Normal and cardiac denervated dogs, with an electromagnetic aortic flowprobe implanted at least 14 days before the experiments, ran at different speeds on a 25% graded treadmill. The experiments were carried out before and after blockade of betareceptors in the heart by PO administration of 125 mg X kg-1 practolol per day. Changes in stroke volume, heart rate, and cardiac output were measured. After beta-adrenergic blockade, only two of the seven dogs with denervated hearts were prepared to run at a limited number of speeds. Time constants of the cardiac output changes at the onset of exercise were significantly different (P less than 0.001) for the normal (11.5 +/- 0.7 s, mean +/- SEM) and the denervated dogs (29.5 +/- 1.1 s), but in normal dogs did not change with practolol (11.8 +/- 0.8 s). The steady state relationship between cardiac output (CO) and work per unit time performed on the treadmill (P) was for normal dogs: CO = 156 + 1.55P, for normal dogs after practolol treatment: CO = 156 + 0.43P (slope significantly different, P less than 0.05), and for dogs with denervated hearts: CO = 121 + 2.06P (not significantly different from normal dogs). It was concluded that changes in the venous or arterial system alone are not sufficient to increase cardiac output appreciably during exercise. The magnitude of the cardiac output increase depends more on the presence of intact beta-receptors than on the presence of intact cardiac nerves.(ABSTRACT TRUNCATED AT 250 WORDS)

References

  1. Am Heart J. 1973 Aug;86(2):216-26 - PubMed
  2. Cardiovasc Res. 1972 Sep;6(5):457-75 - PubMed
  3. J Physiol. 1958 Dec 4;144(2):314-36 - PubMed
  4. Circ Res. 1961 Mar;9:275-81 - PubMed
  5. J Appl Physiol. 1967 Feb;22(2):211-6 - PubMed
  6. Am J Physiol. 1965 Feb;208:255-9 - PubMed
  7. J Appl Physiol Respir Environ Exerc Physiol. 1977 Feb;42(2):133-8 - PubMed
  8. Am J Physiol. 1963 Aug;205:393-400 - PubMed
  9. Acta Cardiol. 1972;Suppl 16:1-18 - PubMed
  10. Circ Res. 1968 Feb;22(2):127-34 - PubMed
  11. J Appl Physiol Respir Environ Exerc Physiol. 1977 Jun;42(6):824-32 - PubMed
  12. J Appl Physiol. 1964 Sep;19:849-52 - PubMed
  13. Am J Physiol. 1964 Dec;207:1325-9 - PubMed
  14. Cardiovasc Res. 1981 Mar;15(3):151-8 - PubMed
  15. Can J Physiol Pharmacol. 1967 Sep;45(5):813-9 - PubMed
  16. J Clin Invest. 1965 Nov;44(11):1745-53 - PubMed
  17. Cardiovasc Res. 1973 Jul;7(4):572-6 - PubMed
  18. Am J Physiol. 1974 Oct;227(4):839-42 - PubMed

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