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[Liver circulation during dopamine therapy]

W Angehrn, E Schmid, F Althaus

    Schweizerische Medizinische Wochenschrift
    |November 5, 1977
    PubMed
    Summary
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    Intravenous dopamine increases hepatic and cardiac blood flow without altering their ratio. This suggests that renal blood flow can be enhanced by dopamine without compromising liver perfusion.

    Area of Science:

    • Pharmacology
    • Hepatology
    • Cardiology

    Context:

    • Dopamine is a vasoactive agent used in critical care.
    • Understanding its effects on splanchnic and systemic circulation is crucial.
    • Previous studies have yielded conflicting results regarding dopamine's impact on hepatic blood flow.

    Purpose:

    • To investigate the dose-dependent effects of intravenous dopamine on hepatic and renal blood flow.
    • To determine if increases in renal blood flow occur at the expense of hepatic blood flow.

    Summary:

    • Intravenous dopamine administration (4 and 8 microgram/kg/min) resulted in a significant increase in hepatic blood flow.
    • Cardiac index also increased proportionally with hepatic blood flow.
    • The ratio of hepatic blood flow to cardiac index remained constant, indicating preserved hepatic perfusion relative to cardiac output.

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    Impact:

    • Dopamine can be safely administered to enhance renal perfusion in patients without compromising hepatic blood flow.
    • These findings have implications for managing hemodynamics in critically ill patients.
    • Provides evidence supporting the use of dopamine in specific clinical scenarios requiring augmented renal perfusion.