Spinal StenosisSpinal CanalLigamentum FlavumLaminectomyLumbar VertebraeDecompression, SurgicalSpinal Cord CompressionPolyradiculopathyCervical VertebraeCauda EquinaSpinal CordSpondylosisSpinal Cord DiseasesMyelographyCarotid StenosisRadiculopathySpinal Cord InjuriesAortic Valve StenosisLumbosacral RegionSpinal FusionIntervertebral Disc DisplacementMagnetic Resonance ImagingSpinal Nerve RootsSpondylolisthesisCoronary StenosisSpinal DiseasesTracheal StenosisInjections, EpiduralThoracic VertebraeLow Back PainNerve Compression SyndromesSemicircular CanalsTreatment OutcomePyloric StenosisMitral Valve StenosisConstriction, PathologicTomography, X-Ray ComputedPulmonary Valve StenosisSpinal NeoplasmsEpidural SpaceSpinal Cord NeoplasmsSpineInjections, SpinalEar CanalSacrumSpinal FracturesBrown-Sequard SyndromeSciaticaDura MaterSpinal NervesBack PainInternal FixatorsAnesthesia, SpinalNeurosurgical ProceduresOrthopedic ProceduresFollow-Up StudiesPain MeasurementIntermittent ClaudicationRoot Canal PreparationSpinal InjuriesSpinal OsteophytosisRetrospective StudiesProspective StudiesDisability EvaluationAchondroplasiaRenal Artery ObstructionLongitudinal LigamentsPostoperative ComplicationsFluoroscopyAortic Stenosis, SubvalvularAnesthetics, LocalSeverity of Illness IndexSteroidsAortic Stenosis, SupravalvularFailed Back Surgery SyndromeIntervertebral DiscProstheses and ImplantsStentsArnold-Chiari MalformationDiskectomyRecovery of FunctionCoronary AngiographyZygapophyseal JointCarotid Artery, InternalEndarterectomy, CarotidTime FactorsAngioplasty, BalloonUltrasonography, Doppler, DuplexRoot Canal IrrigantsTissue AdhesionsLaryngostenosisDental Pulp CavityAortic ValveSurgical Procedures, Minimally InvasiveMuscular Atrophy, SpinalPainTricuspid Valve StenosisAngiographyRoot Canal Filling MaterialsDiscrete Subaortic Stenosis