Symptoms of Malignant Hyperthermiain
Malignant hyperthermia is a severe reaction to a dose of anesthetics. The reaction is sometimes fatal. It is caused by a rare, inherited muscle abnormality. Infrequently, extreme exercise or heat stroke can trigger malignant hyperthermia in someone with the muscle abnormality. In people with the muscle abnormality, muscle cells have an abnormal protein on their surfaces. The protein does not affect muscle function significantly. That is, until the muscles are exposed to a drug that can trigger a reaction.

Symptoms and signs of malignant hyperthermia include:
-- Sweating
-- An abnormally rapid or irregular heartbeat
-- Rapid breathing or uncomfortable breathing
-- Brown or cola-colored urine
-- Very low blood pressure (shock)
-- Flushed skin
-- Confusion
-- Muscle weakness or swelling after the event
-- Rigid or painful muscles, especially in the jaw.
-- A dramatic rise in body temperature, sometimes as high as 113 degrees Fahrenheit