KetamineAnesthetics, DissociativeHeart RateHeartExcitatory Amino Acid AntagonistsAnesthesia, IntratrachealThiopentalAnalgesicsAutonomic Nervous SystemReceptors, N-Methyl-D-AspartateEtomidateDose-Response Relationship, DrugBlood PressureDouble-Blind MethodAdrenergic beta-AntagonistsElectrocardiographyHeart FailureParasympathetic Nervous SystemRats, Sprague-DawleyElectrocardiography, AmbulatoryStereoisomerismPropranololHemodynamicsAtropineSympathetic Nervous SystemVagus NerveOxprenololHeart Rate, FetalRespirationPressoreceptorsAtenololBaroreflexDogsTime FactorsMetoprololPhysical ExertionCross-Over StudiesPropanolaminesHeart DiseasesExercise TestIsoproterenolBradycardiaHeart TransplantationSignal Processing, Computer-AssistedAnesthesiaHeart AtriaMyocardial ContractionMyocardiumTelemetryRestSympathomimeticsReflexHandling (Psychology)Respiratory RatePindololHeart Defects, CongenitalOxygen ConsumptionAnalysis of VarianceArrhythmias, CardiacXylazineLabetalolPostureNorepinephrineCardiac OutputExerciseFetal HeartStimulation, ChemicalParasympatholyticsMuscarinic AntagonistsStroke VolumeAnti-Arrhythmia AgentsCatecholaminesCold TemperatureRats, WistarImmersionEpinephrinePhenylephrineClonidineAdrenergic beta-AgonistsInjections, IntravenousHeart Function TestsAtrioventricular NodeRegional Blood FlowMyocardial InfarctionDrug InteractionsAnesthetics, CombinedCircadian RhythmElectric StimulationCarotid SinusHeart ValvesHeart Conduction SystemHypertensionScopolamine HydrobromideCardiovascular SystemPlacebosAnestheticsCardiotonic AgentsMyocardial IschemiaHeart BlockVentricular Function, Left