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Symptoms

Symptoms and signs of malignant hyperthermia include:

  • A dramatic rise in body temperature, sometimes as high as 113 degrees Fahrenheit

  • Rigid or painful muscles, especially in the jaw.

  • Flushed skin

  • Sweating

  • An abnormally rapid or irregular heartbeat

  • Rapid breathing or uncomfortable breathing

  • Brown or cola-colored urine

  • Very low blood pressure (shock)

  • Confusion

  • Muscle weakness or swelling after the event

Many people who carry a gene for malignant hyperthermia will never develop symptoms.

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