Evidence map›Paper›PMID 20345408›Full record

ReviewActa physiologica (Oxford, England)2010

Disparity in regional and systemic circulatory capacities: do they affect the regulation of the circulation?

J A L Calbet, M J Joyner

Open access · greenAbstract readReview
In one paragraph

Review in Acta physiologica (Oxford, England), 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed, 1 pooled it
24.0field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

32 citing papers in PubMed, 1 synthesis or guideline pooled it, 66 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Article
  5. Review
  6. Article
  7. Sex Differences in Endurance Running.Sports medicine (Auckland, N.Z.) · 2022
    Review
  8. Review
  9. Review
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Review
  17. Article
  18. Impact of age on the vasodilatory function of human skeletal muscle feed arteries.American journal of physiology. Heart and circulatory physiology · 2016
    Article
  19. Article
  20. Increasing blood flow to exercising muscle attenuates systemic cardiovascular responses during dynamic exercise in humans.American journal of physiology. Regulatory, integrative and comparative physiology · 2015
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 2 institutions in 2 countries.

J A L CalbetDepartment of Physical Education, University of Las Palmas de Gran Canaria, Campus Universitario de Tafira s/n, Las Palmas de Gran Canaria, Spain. lopezcalbet@gmail.com
M J Joyner
Universidad de Las Palmas de Gran Canaria · ESWinnMed · US

Funding

MAYO CLINIC CENTER FOR TRANSLATIONAL SCIENCE ACTIVITIESUL1RR024150 · NCRR · MAYO CLINIC ROCHESTER · PI RIZZA, ROBERT A. · 2006 to 2011
$66.4M
PERFUSION OF ACTIVE MUSCLES--METABOLITES AND NERVESR01HL046493 · NHLBI · MAYO CLINIC ROCHESTER · PI JOYNER, MICHAEL J · 1997 to 2011
$3.7M
NCRR NIH HHS RR-024150NCRR NIH HHS UL1 RR024150NHLBI NIH HHS R01 HL046493
6 · The paper itself

Abstract

In this review we integrate ideas about regional and systemic circulatory capacities and the balance between skeletal muscle blood flow and cardiac output during heavy exercise in humans. In the first part of the review we discuss issues related to the pumping capacity of the heart and the vasodilator capacity of skeletal muscle. The issue is that skeletal muscle has a vast capacity to vasodilate during exercise [approximately 300 mL (100 g)(-1) min(-1)], but the pumping capacity of the human heart is limited to 20-25 L min(-1) in untrained subjects and approximately 35 L min(-1) in elite endurance athletes. This means that when more than 7-10 kg of muscle is active during heavy exercise, perfusion of the contracting muscles must be limited or mean arterial pressure will fall. In the second part of the review we emphasize that there is an interplay between sympathetic vasoconstriction and metabolic vasodilation that limits blood flow to contracting muscles to maintain mean arterial pressure. Vasoconstriction in larger vessels continues while constriction in smaller vessels is blunted permitting total muscle blood flow to be limited but distributed more optimally. This interplay between sympathetic constriction and metabolic dilation during heavy whole-body exercise is likely responsible for the very high levels of oxygen extraction seen in contracting skeletal muscle. It also explains why infusing vasodilators in the contracting muscles does not increase oxygen uptake in the muscle. Finally, when approximately 80% of cardiac output is directed towards contracting skeletal muscle modest vasoconstriction in the active muscles can evoke marked changes in arterial pressure.

Indexed as

Blood CirculationBlood PressureCardiac OutputCardiovascular Physiological PhenomenaExerciseHemodynamicsHumansHyperemiaMuscle ContractionMuscle, SkeletalOxygen ConsumptionRegional Blood FlowSympathetic Nervous SystemVasoconstrictionVasodilation

Identifiers

PMID20345408
PMCPMC3011865
OpenAlexW1885795608

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.