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Dantrolene in human malignant hyperthermia

M E Kolb, M L Horne, R Martz

    Anesthesiology
    |April 1, 1982
    PubMed
    Summary

    Lyophilized intravenous dantrolene sodium effectively treats malignant hyperthermia (MH) in anesthesia patients. Early treatment significantly reduces mortality, demonstrating dantrolene

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    Area of Science:

    • Anesthesiology
    • Pharmacology
    • Medical Genetics

    Background:

    • Malignant hyperthermia (MH) is a rare, life-threatening pharmacogenetic disorder of skeletal muscle.
    • Anesthetic agents can trigger MH, leading to hypermetabolism and muscle rigidity.

    Observation:

    • A multicenter study assessed lyophilized intravenous dantrolene sodium for MH treatment.
    • 21 patients received dantrolene; 11 with confirmed or probable MH recovered without sequelae.
    • Delayed treatment (over 24 hours) in 4 patients with unequivocal MH resulted in a 75% mortality rate.

    Findings:

    • Dantrolene sodium administration (mean 2.5 mg/kg) in MH patients showed significant clinical and biochemical improvements.
    • Early dantrolene intervention led to a statistically significant reduction in MH-related mortality.
    • No adverse drug effects were reported in patients treated with dantrolene.

    Implications:

    • The study supports dantrolene's efficacy and specificity in reversing MH, aligning with animal data.
    • Intravenous dantrolene sodium is a critical therapeutic agent for managing anesthetic-related malignant hyperthermia.
    • Timely administration of dantrolene is crucial for improving patient outcomes in MH crises.

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