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Related Experiment Videos

Renal nerves and hypertension: an update.

R E Katholi

    Federation Proceedings
    |October 1, 1985
    PubMed
    Summary

    Renal denervation can prevent or delay hypertension development in animal models by reducing sympathetic nervous system activity. This procedure also attenuates established hypertension, suggesting a role for renal nerves in its pathogenesis.

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    Area of Science:

    • Nephrology
    • Cardiovascular Physiology
    • Hypertension Research

    Background:

    • Increased efferent renal sympathetic nerve activity is linked to hypertension development.
    • Renal nerve activity influences arterial pressure and sodium excretion.
    • Sympathetically mediated renal vasoconstriction is implicated in human essential hypertension.

    Purpose of the Study:

    • To investigate the role of renal nerves in the development and maintenance of hypertension.
    • To determine if interrupting renal nerves prevents or attenuates hypertension in animal models.

    Main Methods:

    • Renal denervation was performed in various animal models of hypertension, including spontaneously hypertensive rats and Goldblatt hypertensive rats.
    • Arterial pressure, sodium excretion, and sympathoadrenal activity were monitored.
    • Comparisons were made between denervated and control groups.

    Main Results:

    • Renal denervation delayed hypertension development and increased sodium excretion in young spontaneously hypertensive rats and deoxycorticosterone acetate-salt-treated rats.
    • Renal denervation attenuated established hypertension in Goldblatt models and coarctation models.
    • The blood pressure-lowering effect of denervation was linked to reduced sympathoadrenal activity, not changes in renin or sodium excretion.

    Conclusions:

    • Efferent renal sympathetic nerves contribute to hypertension development.
    • Afferent renal nerves may promote renovascular hypertension by increasing sympathetic nervous system activity.
    • Renal denervation is a potential therapeutic strategy for hypertension, particularly renovascular hypertension.

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