Patients with the rs193922747 TT genotype may have a decreased, but not absent, risk for malignant hyperthermia based on this variant when treated with volatile anesthetics (desflurane, enflurane, halothane, isoflurane, methoxyflurane, sevoflurane) and/or succinylcholine as compared to patients with genotype CT and CC. Other genetic or clinical factors may also influence the risk for malignant hyperthermia.