injuries and poisoning
Malignant Hyperthermia
Symptoms of Malignant Hyperthermia
Malignant hyperthermia may develop during anesthesia or shortly after surgery. Often, the first signs are rapid breathing, a fast heart rate, and muscle rigidity, especially in the jaw. Temperature usually becomes extremely high (usually over 104° [40° C] and sometimes higher than 109° F [43° C]). Abnormal heart rhythms, nausea, and vomiting may occur. Urine may appear brown or bloody. 