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Body-fluid composition in normal and hypertensive man

J H Bauer, C S Brooks

    Clinical Science (London, England : 1979)
    |January 1, 1982
    PubMed
    Summary

    Hypertension is associated with reduced extracellular fluid volume (ECFV) and total blood volume. However, the proportion of plasma volume within the ECFV remains unchanged in hypertensive individuals.

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    Area of Science:

    • Physiology
    • Nephrology
    • Cardiovascular Medicine

    Background:

    • Hypertension is a complex condition with potential alterations in body fluid composition.
    • Understanding fluid volume status is crucial for managing hypertensive patients.

    Purpose of the Study:

    • To accurately determine body fluid composition in hypertensive versus normotensive individuals.
    • To investigate potential disorders in body-fluid composition associated with hypertension.

    Main Methods:

    • Simultaneous measurement of erythrocyte mass, plasma volume (PV), extracellular fluid volume (ECFV), and total body water.
    • Comparison between 30 normotensive and 30 normal-renin hypertensive Caucasian males.

    Main Results:

    • Hypertensive subjects exhibited lower plasma volume and total blood volume compared to normotensive controls.
    • Extracellular fluid volume (ECFV) was reduced in hypertensive individuals.
    • The proportion of plasma volume within the ECFV remained consistent between groups.

    Conclusions:

    • Hypertension is characterized by a reduction in extracellular fluid volume (ECFV).
    • The partition of ECFV between plasma and interstitial fluid is not altered in hypertension.

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