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Cardiovascular changes in sepsis

J H Duff

    Heart & Lung : the Journal of Critical Care
    |September 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Severe sepsis hyperdynamic circulation isn't from shunts but increased capillary flow. Elevated blood flow may stem from protein catabolism, suggesting energy substrates, not just blood pressure, are key treatments.

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    Area of Science:

    • Critical care medicine
    • Physiology
    • Metabolic research

    Background:

    • Severe sepsis is characterized by hyperdynamic circulation.
    • The role of peripheral arteriovenous shunts in this state is debated.
    • Existing models of septic shock progression may not universally apply.

    Purpose of the Study:

    • To investigate the cause of hyperdynamic circulation in severe sepsis.
    • To re-evaluate the relationship between blood flow and mortality in sepsis.
    • To explore the metabolic underpinnings of sepsis-induced circulatory changes.

    Main Methods:

    • Analysis of skeletal muscle capillary blood flow in septic patients.
    • Correlation of blood flow with cardiac index and patient outcomes.
    • Comparison of circulatory and metabolic states in sepsis, fasting, and postoperative conditions.

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    Main Results:

    • Skeletal muscle capillary blood flow is increased in severe sepsis, correlating with cardiac index.
    • Peripheral arteriovenous shunts are unlikely to be the primary cause of hyperdynamic circulation.
    • Normal blood flow in critically ill septic patients suggests flow is not the sole determinant of mortality.
    • Increased blood flow is observed in catabolic states, including sepsis and fasting.

    Conclusions:

    • Hyperdynamic circulation in sepsis may be a response to protein catabolism for energy.
    • Current sepsis treatment focused on increasing blood flow and pressure may need re-evaluation.
    • Future therapies should consider providing energy substrates and promoting anabolism to manage sepsis.