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Malignant hyperthermia.

T L Lee1, A Kumar, K S Ng

  • 1Department of Anaesthesia, National University Hospital, Singapore.

Annals of the Academy of Medicine, Singapore
|May 1, 1990
PubMed
Summary
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Malignant hyperthermia (MH) is a rare, life-threatening reaction to anesthesia. Early diagnosis using end-tidal CO2 monitoring and prompt dantrolene treatment can improve outcomes in MH crises.

Area of Science:

  • Anesthesiology
  • Pharmacology
  • Critical Care Medicine

Background:

  • Malignant hyperthermia (MH) is a severe pharmacogenetic disorder of skeletal muscle.
  • Triggered by volatile anesthetics and succinylcholine, MH presents as a hypermetabolic crisis.
  • Prompt recognition and treatment are crucial for patient survival.

Observation:

  • Case 1: A patient developed a rapid MH crisis with severe tachycardia and hyperthermia (43°C) intraoperatively, leading to fatal myocardial failure despite resuscitation efforts.
  • Case 2: Another patient exhibited increasing end-tidal carbon dioxide (hypercarbia) after succinylcholine and isoflurane administration, indicating early MH.
  • The second case highlights the utility of end-tidal CO2 monitoring for timely MH diagnosis.

Findings:

  • The first case illustrates a fulminant MH reaction with a poor prognosis.

Related Experiment Videos

  • The second case demonstrates the effectiveness of end-tidal CO2 monitoring in facilitating early MH diagnosis.
  • Early administration of dantrolene in the second case was associated with a favorable outcome.

    • Implications:

    • This report underscores the critical importance of vigilant intraoperative monitoring for MH.
    • End-tidal CO2 monitoring serves as an invaluable tool for the early detection of MH crises.
    • Prompt therapeutic intervention with dantrolene is essential for managing MH and improving patient outcomes.