Evidence map›Paper›PMID 19429523›Full record

ArticleRespiratory physiology & neurobiology2009

Effects of baroreceptor activation on respiratory variability in rat.

Simon McMullan, Thomas E Dick, Melissa M J Farnham, Paul M Pilowsky

Open access · greenAbstract read
In one paragraph

Article in Respiratory physiology & neurobiology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
2.8field-weighted citation impact, top 9% 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

19 citing papers in PubMed, 39 citations in OpenAlex.

  1. Review
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  10. Kölliker-Fuse nuclei regulate respiratory rhythm variability via a gain-control mechanism.American journal of physiology. Regulatory, integrative and comparative physiology · 2017
    Article
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  12. Review
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  15. Cardio-ventilatory coupling in young healthy resting subjects.Journal of applied physiology (Bethesda, Md. : 1985) · 2012
    Article
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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

4 authors at 2 institutions in 2 countries.

Simon McMullanAustralian School of Advanced Medicine, Macquarie University, 3 Innovation Road, Sydney, NSW 2109, Australia.
Thomas E Dick
Melissa M J Farnham
Paul M Pilowsky
Macquarie University · AUCase Western Reserve University · US

Funding

Cardiorespiratory Afferent Control in Heart FailureR01HL080318 · NHLBI · CASE WESTERN RESERVE UNIVERSITY · PI DICK, THOMAS E · 2005 to 2008
$1.0M
NHLBI NIH HHS HL080318NHLBI NIH HHS R01 HL080318
6 · The paper itself

Abstract

Controversy surrounds the respiratory responses to baroreceptor activation. Although many reflexes that effect respiration (e.g. chemoreflexes and nociceptive reflexes) frequently affect cardiovascular parameters, the effect of baroreflex stimulation within normal physiological limits is generally considered to affect only blood pressure and heart rate. Even though previous authors have reported that baroreceptor activation can affect respiratory activity, the effects on respiratory frequency and amplitude are highly variable, and changes in perfusion evoked by blood pressure manipulation could account for the observed effects. Here, we determined the respiratory effects of activating arterial baroreceptors by intravenous injection of phenylephrine or angiotensin II, or by electrical stimulation of the aortic depressor nerve (ADN). In urethane-anesthetized vagotomized rats, 1, 2 and 4s trains of tetanic ADN stimulation evoked 3.1+/-1.1%, 11.2+/-13.6% and 21.9+/-8.9% increases in inspiratory (TI) time and 26.5+/-18%, 23.4+/-15.7% and 34.6+/-20.9% increases in expiratory (TE) time, respectively (P<0.05 in both cases), but no effect on the amplitude of bursts recorded in the phrenic nerve. Similar effects were observed following pressor trials evoked by intravenous PE (TE: +26.1+/-9.1%, P<0.01), but not Ang II. Intermittent ADN stimulation (single pulse, 1 Hz) significantly increased the variability of TI during periods of low respiratory drive (P<0.05) without significantly affecting any other parameters. We propose that a specific baroreceptor-respiratory response exists that is independent of changes in blood flow. In contrast to the effects of baroreceptor stimulation on sympathetic nerve activity, the baro-respiratory response is subtle and highly dependent on respiratory drive.

Indexed as

RespirationAnalysis of VarianceAngiotensin IIAnimalsAortaAutonomic DenervationBaroreflexBiophysicsBlood PressureCardiovascular Physiological PhenomenaElectric StimulationHeart RateInjections, IntravenousMalePhenylephrinePhrenic NerveAngiotensin IIPhenylephrineVasoconstrictor Agents

Identifiers

PMID19429523
PMCPMC2680772
OpenAlexW2090316219

What OpenQuestion holds

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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.