Muscle RigidityCarbon DioxideOxygen ConsumptionPulmonary Gas ExchangeRespirationCalorimetry, IndirectPulmonary VentilationNeuroleptic Malignant SyndromeMasseter MuscleExercise TestSuccinylcholineMalignant HyperthermiaEnergy MetabolismAlfentanilOxygenCarbonCalorimetryHeart FailurePhysical ExertionExerciseFentanylHeart RateExercise ToleranceHalothaneMusclesTime FactorsMuscle ProteinsMuscle, SkeletalMuscle, SmoothNitrogen DioxideMuscle Fibers, SkeletalMuscle, Smooth, VascularCarbon MonoxidePartial PressureMuscle ContractionSulfur DioxideCapnography