Comparison of exogenous adenosine and voluntary exercise on human skeletal muscle perfusion and perfusion heterogeneity

Journal of Applied Physiology
Ilkka H HeinonenKari K Kalliokoski

Abstract

Adenosine is a widely used pharmacological agent to induce a "high-flow" control condition to study the mechanisms of exercise hyperemia, but it is not known how well an adenosine infusion depicts exercise-induced hyperemia, especially in terms of blood flow distribution at the capillary level in human muscle. Additionally, it remains to be determined what proportion of the adenosine-induced flow elevation is specifically directed to muscle only. In the present study, we measured thigh muscle capillary nutritive blood flow in nine healthy young men using PET at rest and during the femoral artery infusion of adenosine (1 mg min(-1) l thigh volume(-1)), which has previously been shown to induce a maximal whole thigh blood flow of approximately 8 l/min. This response was compared with the blood flow induced by moderate- to high-intensity one-leg dynamic knee extension exercise. Adenosine increased muscle blood flow on average to 40 +/- 7 ml x min(-1) x 100 g muscle(-1) with an aggregate value of 2.3 +/- 0.6 l/min for the whole thigh musculature. Adenosine also induced a substantial change in blood flow distribution within individuals. Muscle blood flow during the adenosine infusion was comparable with blood flow in moderate- to hi...Continue Reading

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Citations

Feb 25, 2011·Journal of Nuclear Cardiology : Official Publication of the American Society of Nuclear Cardiology·A M ScholtensR H J A Slart
Jun 18, 2011·Journal of Applied Physiology·Ilkka HeinonenCraig G Crandall
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Jan 20, 2018·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Ilkka Heinonen, Jari A Laukkanen
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Jan 10, 2012·Journal of Applied Physiology·Ilkka HeinonenKari K Kalliokoski
May 15, 2013·American Journal of Physiology. Heart and Circulatory Physiology·Ilkka HeinonenKari K Kalliokoski
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