Defibrillators, ImplantableDefibrillatorsElectric CountershockEquipment FailurePacemaker, ArtificialTachycardia, VentricularVentricular FibrillationElectrodes, ImplantedDeath, Sudden, CardiacDevice RemovalArrhythmias, CardiacCardiac Pacing, ArtificialEquipment SafetyHeart ArrestEquipment DesignElectric InjuriesTreatment OutcomeCardiac Resynchronization TherapyProsthesis ImplantationCentral Nervous System Vascular MalformationsAlternative SplicingElectrocardiographyProstheses and ImplantsCardiac Resynchronization Therapy DevicesBalloon OcclusionImplantable NeurostimulatorsAnti-Arrhythmia AgentsEmbolization, TherapeuticFollow-Up StudiesAmiodaroneEquipment Failure AnalysisCoronary SinusCarotid-Cavernous Sinus FistulaCavernous SinusHeart FailureSyncopeSubclavian VeinTachycardiaCardiopulmonary ResuscitationRetrospective StudiesInfusion Pumps, ImplantableProspective StudiesTime FactorsCerebral VeinsForeign-Body MigrationArteriovenous FistulaCranial SinusesFeasibility StudiesPolyvinylsHeart BlockCatheterizationVentricular Dysfunction, LeftAtrial FibrillationTelemetryCatheterization, PeripheralElectrophysiologic Techniques, CardiacVena Cava, SuperiorElectrocardiography, AmbulatoryOut-of-Hospital Cardiac ArrestVenous CutdownStroke VolumePhlebographyRecurrenceRisk AssessmentElectromagnetic PhenomenaDura MaterBrugada SyndromeCardiomyopathiesBradycardiaRisk FactorsTachycardia, SupraventricularPrimary PreventionHeart-Assist DevicesEndocardiumHeart VentriclesRemote Sensing TechnologyBundle-Branch BlockDeath, SuddenThoracotomyElectrodesCardiac ElectrophysiologySurvival RateCerebral AngiographyHeart Conduction SystemCardiac CatheterizationProsthesis DesignCardiography, ImpedanceCardiomyopathy, DilatedFemoral VeinPericardiumSurvival AnalysisMonitoring, AmbulatoryProsthesis FailureVolunteersCatheterization, Central VenousEsophageal and Gastric VaricesTherapy, Computer-AssistedMitral Valve StenosisCost-Benefit AnalysisCatheter Ablation