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5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat
08:50

5/6th Nephrectomy in Combination with High Salt Diet and Nitric Oxide Synthase Inhibition to Induce Chronic Kidney Disease in the Lewis Rat

Published on: July 3, 2013

[Calciuretic function of the kidneys in chronic cardiac insufficiency]

K A Merzon

    Terapevticheskii Arkhiv
    |January 1, 1985
    PubMed

    Insights

    Kidney calcium excretion (Eca) significantly drops in chronic heart insufficiency (CHI). Patients with CHI show a reduced calciuresis response to calcium lactate due to impaired tubular reabsorption.

    Area of Science:

    • Nephrology
    • Cardiology
    • Calcium Metabolism

    Context:

    • Chronic heart insufficiency (CHI) is associated with altered mineral metabolism.
    • Kidney function, specifically calcium excretion (Eca), is impaired in CHI patients.
    • Understanding these changes is crucial for managing CHI complications.

    Purpose:

    • To investigate the mechanisms behind reduced kidney calcium excretion in chronic heart insufficiency.
    • To determine the role of tubular calcium reabsorption in the blunted calciuresis response to oral calcium lactate in CHI.
    • To explore potential extrarenal factors influencing calcium handling in CHI.

    Summary:

    • Calcium excretion (Eca) by the kidneys decreases progressively with advancing chronic heart insufficiency (CHI).
    • In stage III CHI, daily Eca is reduced by approximately 75% compared to normal levels.
    • Reduced calciuresis is attributed to hemodynamic changes, decreased glomerular filtration, and enhanced tubular calcium reabsorption.
    • The ability to inhibit tubular calcium reabsorption after oral calcium lactate intake is significantly impaired in CHI patients, leading to a diminished calciuresis response.
    • Increased tubular calcium reabsorption in CHI is hypothesized to be influenced by extrarenal regulatory factors, compromising the body's ability to handle excess calcium.

    Impact:

    • This research highlights a key metabolic derangement in chronic heart insufficiency.
    • Findings suggest potential therapeutic targets for improving calcium balance in CHI patients.
    • Understanding impaired calcium excretion can inform clinical management and reduce associated risks.

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