• Eur. J. Appl. Physiol. · Jan 2015

    Effects of whole body heat stress on sublingual microcirculation in healthy humans.

    • Andrius Pranskunas, Zivile Pranskuniene, Egle Milieskaite, Laura Daniuseviciute, Ausrele Kudreviciene, Astra Vitkauskiene, Albertas Skurvydas, and Marius Brazaitis.
    • Department of Intensive Care Medicine, Lithuanian University of Health Sciences, Eiveniu str.2, 50009, Kaunas, Lithuania, a.pranskunas@gmail.com.
    • Eur. J. Appl. Physiol. 2015 Jan 1; 115 (1): 157-65.

    PurposeTo assess the effect of whole body heat stress on sublingual microcirculation.MethodsFourteen apparently healthy subjects participated in the study. Passive body heating was performed by immersing the subjects up to the waist in a water bath at 44 °C continuously until a rectally obtained core temperature of 39.5 °C was reached. Systemic hemodynamic parameters and sublingual microcirculation were evaluated and recorded before heating, immediately after heating, and 1 h after heating.ResultsThe subjects showed very high physiological stress and significantly increased noradrenaline and prolactin concentrations in the blood. Whole body heating resulted in significantly increased oxygen uptake, heart rate, and cardiac output. One hour after heating, heart rate remained increased, but cardiac output almost returned to baseline. Mean arterial pressure significantly decreased after heating and remained decreased for at least 1 h. There was no significant difference in the microvascular flow index and proportion of perfused vessels of small vessels at the end of heating and 1 h after heating, in comparison with baseline variables. However, functional capillary density and total vessel density of small vessels significantly increased at the end of heating (10.8 ± 2.4 vs. 11.7 ± 2.0 1/mm and 19.5 ± 3.5 vs. 22.2 ± 3.3 mm/mm(2), p < 0.05, respectively) and remained increased 1 h after heating.ConclusionWhole body heat stress increases sublingual functional capillary density, oxygen consumption, and cardiac output.

      Pubmed     Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…

Want more great medical articles?

Keep up to date with a free trial of metajournal, personalized for your practice.
1,694,794 articles already indexed!

We guarantee your privacy. Your email address will not be shared.