Porcine Malignant Hyperthermia

  • Gerald A. Gronert
Conference paper


Porcine malignant hyperthermia (MH) differs from human MH in that it is a homozygotic expression of a single point mutation in all muscular species. This mutation probably occurred about 100–150 years ago. Pigs were bred then, as now, with the idea that selection of the most muscular offspring, followed by line breeding, would produce the most valuable marketable animal: lean, muscular, with little fat and rapid development of the muscular build. Unfortunately, not all characteristics were desirable. Although rapid development of lean body mass represented a true hybrid vigor, a rather marked disadvantage was an obvious overt sensitivity to stress. Certain stress, such as fright, shipping, coitus, and fighting, led to a process identical to MH episodes generally produced by triggering anesthetics: rigidity, tachycardia, tachypnea, acidosis, high fever, and death. This end result could occur in as few as 10 min, with a body temperature greater than 43°C.


Ryanodine Receptor Malignant Hyperthermia Malignant Hyperthermia Suxamethonium Chloride Dantrolene Sodium 
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Copyright information

© Springer-Verlag Tokyo 1996

Authors and Affiliations

  • Gerald A. Gronert
    • 1
  1. 1.Department of AnesthesiaUniversity of CaliforniaDavisUSA

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