(malignant hyperthermia) A rare drug reaction characterized by a rapid rise of the body temperature and rhabdomyolysis.

(malignant hyperthermia) Malignant hyperthermia is characterized by a rapid increase in temperature to 39-42 degrees C in response to inhalational anesthetics such as halothane or to muscle relaxants such as succinylcholine.

(malignant hyperthermia) Rapid and excessive rise of temperature accompanied by muscular rigidity following general anesthesia.

(malignant hyperthermia) Usually inherited reaction to general anesthesia manifested as a sudden, rapid rise in temperature, hypermetabolism, and skeletal muscle rigidity; mutation is in the calcium release channel of skeletal muscle sarcoplasmic reticulum.

(malignant hyperthermia syndrome) A rare disorder characterized by rapid rise of the body temperature, accompanied by rhabdomyolysis and, if untreated, by collapse and death. It occurs in susceptible individuals who receive certain drugs for general anesthesia, gas anesthetics, or succinylcholine. It may be inherited in an autosomal dominant pattern.

Malignant hyperthermia susceptibility (MHS) is a pharmacogenetic disorder of skeletal muscle calcium regulation associated with uncontrolled skeletal muscle hypermetabolism. Manifestations of malignant hyperthermia (MH) are precipitated by certain volatile anesthetics (i.e., halothane, isoflurane, sevoflurane, desflurane, enflurane), either alone or in conjunction with a depolarizing muscle relaxant (specifically, succinylcholine). The triggering substances cause uncontrolled release of calcium from the sarcoplasmic reticulum and may promote entry of extracellular calcium into the myoplasm, causing contracture of skeletal muscles, glycogenolysis, and increased cellular metabolism, resulting in production of heat and excess lactate. Affected individuals experience acidosis, hypercapnia, tachycardia, hyperthermia, muscle rigidity, compartment syndrome, rhabdomyolysis with subsequent increase in serum creatine kinase (CK) concentration, hyperkalemia with a risk for cardiac arrhythmia or even cardiac arrest, and myoglobinuria with a risk for renal failure. In nearly all cases, the first manifestations of MH (tachycardia and tachypnea) occur in the operating room; however, MH may also occur in the early postoperative period. There is mounting evidence that some individuals with MHS will also develop MH with exercise and/or on exposure to hot environments. Without proper and prompt treatment with dantrolene sodium, mortality is extremely high.

Malignant hyperthermia is a life-threatening elevation in body temperature usually resulting from a hypermetabolic response to concurrent use of a depolarizing muscle relaxant and a potent, volatile inhalational general anesthetic. Manifestations can include muscle rigidity, hyperthermia, tachycardia, tachypnea, rhabdomyolysis, and...

Malignant hyperthermia (MH) is a life-threatening clinical syndrome of hypermetabolism involving the skeletal muscle. It is triggered in susceptible individuals primarily by the volatile inhalational anesthetic agents and the muscle relaxant succinylcholine, though other drugs have also been implicated as potential triggers.

Malignant hyperthermia is a severe reaction to certain drugs used for anesthesia. This severe reaction typically includes a dangerously high body temperature, rigid muscles or spasms, a rapid heart rate, and other symptoms. Without prompt treatment, the complications caused by malignant hyperthermia can be fatal.

Malignant hyperthermia (MH) is a severe reaction to certain gases used during anesthesia and/or a muscle relaxant used to temporarily paralyze a person during surgery. Signs and symptoms of MH include marked hyperthermia, a rapid heart rate, rapid breathing, acidosis, muscle rigidity, and breakdown of muscle tissue (rhabdomyolysis)....

Malignant hyperthermia (MH) is a syndrome that typically follows exposure to potent inhalation anesthetics and/or succinylcholine in susceptible individuals. This exposure produces a dramatic increase in metabolism, which leads to critical temperature elevation and rhabdomyolysis with potential hyperkalemia. In the absence of central...