SpasmBarium SulfateBariumSpasms, InfantileHemifacial SpasmBarium CompoundsCoronary VasospasmEnemaEsophageal Spasm, DiffuseErgonovineAngina Pectoris, VariantFacial MusclesBlepharospasmVigabatrinStrontiumEsophageal AchalasiaDiverticulum, ColonManometryDeglutition DisordersFacial Nerve DiseasesSigmoidoscopyMacrocystisEsophagusColonic DiseasesEsophageal DiseasesColonoscopyContrast MediaDeglutitionAcetylcholineNeuromuscular AgentsFluoroscopyPotassiumBarium RadioisotopesMuscle SpasticityHernia, HiatalFacial NerveStiff-Person SyndromeLaminariaAngina PectorisCoronary AngiographyCalciumMembrane PotentialsBotulinum Toxins, Type AEsophageal Motility DisordersOxytocicsCerebellopontine AngleCalcium Channel BlockersPotassium ChannelsEsophageal Sphincter, LowerVasodilator AgentsNerve Compression SyndromesMicrovascular Decompression SurgeryCholecystographyAnticonvulsantsColonography, Computed TomographicNitroglycerinTrigeminal NeuralgiaGastrointestinal HemorrhageDiverticulum, EsophagealAnti-Dyskinesia AgentsElectron Probe MicroanalysisCoronary VesselsIntestinal ObstructionPeristalsisDiatrizoate MeglumineOccult BloodBisacodylIntussusceptionCesiumAdrenocorticotropic Hormone