Evidence map›Paper›PMID 19729589›Full record

ArticleJournal of applied physiology (Bethesda, Md. : 1985)2009

NOS inhibition blunts and delays the compensatory dilation in hypoperfused contracting human muscles.

Darren P Casey, Michael J Joyner

Open access · greenAbstract read
In one paragraph

Article in Journal of applied physiology (Bethesda, Md. : 1985), 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
15.9field-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

22 citing papers in PubMed, 35 citations in OpenAlex.

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  10. Muscle blood flow, hypoxia, and hypoperfusion.Journal of applied physiology (Bethesda, Md. : 1985) · 2014
    Review
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

2 authors at 1 institution in 1 country.

Darren P CaseyDepartment of Anesthesiology, Mayo Clinic, Rochester, Minnesota 55905, USA. casey.darren@mayo.edu
Michael J Joyner
Mayo Clinic · 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
Role of Adenosine in Compensatory Dilation During Hypoxic ExerciseF32AR055819 · NIAMS · MAYO CLINIC ROCHESTER · PI CASEY, DARREN PATRICK · 2008 to 2010
$149k
PERFUSION OF ACTIVE MUSCLES: METABOLITES AND NERVESR29HL046493 · NHLBI · MAYO CLINIC COLL OF MEDICINE, ROCHESTER · PI JOYNER, MICHAEL J · 1992 to 1996
–
NCRR NIH HHS RR-024150NHLBI NIH HHS HL-46493NIAMS NIH HHS AR-55819
6 · The paper itself

Abstract

We previously demonstrated that skeletal muscle blood flow is restored in the exercising forearm during experimental hypoperfusion via local dilator and/or myogenic mechanisms. This study examined the role of nitric oxide (NO) in the restoration of blood flow to the active muscles during hypoperfusion. Eleven healthy subjects (10 men/1 woman; 25 +/- 1 yr of age) performed rhythmic forearm exercise (10% and 20% of maximum) while hypoperfusion was evoked by balloon inflation in the brachial artery above the elbow. Each trial included baseline, exercise, exercise with inflation, and exercise after deflation (3 min each). Forearm blood flow (FBF; ultrasound) and local (brachial artery catheter pressure, BAP) and systemic arterial pressure [mean arterial pressure (MAP); Finometer] were measured. The exercise bouts were repeated during N(G)-monomethyl-L-arginine (L-NMMA) infusion (NO synthase inhibition). Forearm vascular conductance (FVC; ml x min(-1) x 100 mmHg(-1)) was calculated from BF (ml/min) and BAP (mmHg). FBF and FVC fell acutely with balloon inflation during all trials (P < 0.01). Recovery of FBF and FVC [(inflation - nadir)/(steady-state exercise - nadir)] with L-NMMA administration was reduced during 20% exercise (FBF = 77 +/- 7% vs. 88 +/- 8%; FVC = 71 +/- 8% vs. 90 +/- 9%; P < 0.01) but not 10% exercise (FBF = 83 +/- 4% vs. 81 +/- 5%, P = 0.37; FVC = 75 +/- 10% vs. 76 +/- 7%; P = 0.44) compared with the respective control trial. The time to steady-state vasodilator response was substantially longer during the l-NMMA trials (10% = 74 +/- 4 s vs. 61 +/- 6 s; 20% = 53 +/- 4 s vs. 41 +/- 4 s; P < 0.05). Thus the magnitude and timing of the NO contribution to compensatory dilation during forearm exercise with hypoperfusion was dependent on exercise intensity. These observations suggest that NO is released by contracting muscles or that a portion of the dilation caused by ischemic metabolites is NO dependent.

Indexed as

AcetylcholineAdultBlood Flow VelocityBlood PressureBrachial ArteryEnzyme InhibitorsFemaleForearmHeart RateHumansMaleMotor ActivityMuscarinic AgonistsMuscle ContractionMuscle, SkeletalNitric Oxide SynthaseAcetylcholineEnzyme InhibitorsMuscarinic AgonistsNitric Oxide Synthaseomega-N-Methylarginine

Identifiers

PMID19729589
PMCPMC2793197
OpenAlexW2038111537

What OpenQuestion holds

Textmetadata
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.