Evidence map›Paper›PMID 23292718›Full record

ArticleAmerican journal of physiology. Heart and circulatory physiology2013

Spontaneous bursts of muscle sympathetic nerve activity decrease leg vascular conductance in resting humans.

Seth T Fairfax, Jaume Padilla, Lauro C Vianna, Michael J Davis, Paul J Fadel

Registry-linked trialOpen access · greenAbstract read
In one paragraph

Article in American journal of physiology. Heart and circulatory physiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03109795 (Anxiety-mediated Impairments in Large Elastic Artery Function and the Autonomic Nervous System), which is not on this map. Cited by 79 papers.

0numbers the graph read from it
0cells of the map it votes in
79citing papers in PubMed
5.1field-weighted citation impact, top 4% 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.

NCT03109795 phase4terminatednot on this mapstarted 2017, after this paper: background citation

Anxiety-mediated Impairments in Large Elastic Artery Function and the Autonomic Nervous System

TypeinterventionalSponsorUniversity of IowaRan2017 to 2023Enrolled35ConditionsAnxiety, HypertensionArmsClonidine Pill, Hydrochlorothiazide
3 · Its place in the literature

Who cites it

79 citing papers in PubMed, 136 citations in OpenAlex.

  1. Trial
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  5. Short-term water deprivation does not increase blood pressure variability or impair neurovascular function in healthy young adults.American journal of physiology. Regulatory, integrative and comparative physiology · 2020
    Trial
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  7. Review
  8. Article
  9. The role of αAmerican journal of physiology. Heart and circulatory physiology · 2025
    Article
  10. Article
  11. Article
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  13. Human sympathetic neuronal discharge and recruitment patterns regulate neuropeptide Y bioavailability.American journal of physiology. Heart and circulatory physiology · 2024
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  14. Article
  15. Article
  16. Article
  17. Article
  18. Sympathetic baroreflex sensitivity is enhanced in postmenopausal women.Journal of applied physiology (Bethesda, Md. : 1985) · 2024
    Article
  19. Article
  20. Review

19 more citing papers are in PubMed but not listed here.

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

5 authors at 1 institution in 1 country.

Seth T FairfaxDepartment of Biomedical Sciences, University of Missouri, Columbia, MO 65212 ,USA.
Jaume Padilla
Lauro C Vianna
Michael J Davis
Paul J Fadel
University of Missouri · US

Funding

Regulation Microvascular: Smooth Muscle Contraction ECM-Integrin-CytoskeletalP01HL095486 · NHLBI · UNIVERSITY OF MISSOURI-COLUMBIA · PI DAVIS, GEORGE E · 2010 to 2014
$8.4M
Aging, Sex, and Neural Cardiovascular Control During Dynamic ExerciseR01HL093167 · NHLBI · UNIVERSITY OF MISSOURI-COLUMBIA · PI FADEL, PAUL J · 2008 to 2012
$2.0M
NHLBI NIH HHS P01-HL-095486NHLBI NIH HHS R01-HL-093167
6 · The paper itself

Abstract

Previous studies in humans attempting to assess sympathetic vascular transduction have related large reflex-mediated increases in muscle sympathetic nerve activity (MSNA) to associated changes in limb vascular resistance. However, such procedures do not provide insight into the ability of MSNA to dynamically control vascular tone on a beat-by-beat basis. Thus we examined the influence of spontaneous MSNA bursts on leg vascular conductance (LVC) and how variations in MSNA burst pattern (single vs. multiple bursts) and burst size may affect the magnitude of the LVC response. In 11 young men, arterial blood pressure, common femoral artery blood flow, and MSNA were continuously recorded during 20 min of supine rest. Signal averaging was used to characterize percent changes in LVC for 15 cardiac cycles following heartbeats associated with and without MSNA bursts. LVC significantly decreased following MSNA bursts, reaching a nadir during the 6th cardiac cycle (single bursts, -2.9 ± 1.1%; and multiple bursts, -11.0 ± 1.4%; both, P < 0.001). Individual MSNA burst amplitudes and the total amplitude of consecutive bursts were related to the magnitude of peak decreases in LVC. In contrast, cardiac cycles without MSNA bursts were associated with a significant increase in LVC (+3.1 ± 0.5%; P < 0.001). Total vascular conductance decreased in parallel with LVC also reaching a nadir around the peak rise in arterial blood pressure following an MSNA burst. Collectively, these data are the first to assess beat-by-beat sympathetic vascular transduction in resting humans, demonstrating robust and dynamic decreases in LVC following MSNA bursts, an effect that was absent for cardiac cycles without MSNA bursts.

Indexed as

AdultBlood PressureFemoral ArteryHeart RateHumansMaleMuscle, SkeletalPulsatile FlowRegional Blood FlowRestSympathetic Nervous SystemVascular ResistanceYoung Adult

Identifiers

PMID23292718
PMCPMC3602753
OpenAlexW2139729561

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

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.