Defibrillators, ImplantableDefibrillatorsPacemaker, ArtificialElectric CountershockDevice RemovalEquipment FailureTachycardia, VentricularVentricular FibrillationCardiac Resynchronization Therapy DevicesProsthesis-Related InfectionsElectrodes, ImplantedDeath, Sudden, CardiacArrhythmias, CardiacCardiac Pacing, ArtificialEndocarditisEquipment SafetyHeart ArrestEquipment DesignElectric InjuriesCardiac Resynchronization TherapyCentral Nervous System Vascular MalformationsAlternative SplicingTreatment OutcomeElectrocardiographyProsthesis ImplantationBalloon OcclusionImplantable NeurostimulatorsProstheses and ImplantsThoracic NeoplasmsAnti-Arrhythmia AgentsEmbolization, TherapeuticAmiodaroneFollow-Up StudiesCavernous SinusEquipment Failure AnalysisCarotid-Cavernous Sinus FistulaHeart FailureCoronary SinusSyncopeTachycardiaSubclavian VeinCardiopulmonary ResuscitationInfusion Pumps, ImplantableCerebral VeinsRetrospective StudiesCranial SinusesArteriovenous FistulaProspective StudiesPolyvinylsHeart BlockTime FactorsAtrial FibrillationVentricular Dysfunction, LeftForeign-Body MigrationTelemetryElectrophysiologic Techniques, CardiacFeasibility StudiesElectrocardiography, AmbulatoryVena Cava, SuperiorOut-of-Hospital Cardiac ArrestVenous CutdownCatheterization, PeripheralStroke VolumeBrugada SyndromeCardiomyopathiesElectromagnetic PhenomenaDura MaterCatheterizationRisk AssessmentBradycardiaRecurrenceTachycardia, SupraventricularPrimary PreventionRemote Sensing TechnologyPhlebographyEndocardiumBundle-Branch BlockDeath, SuddenRisk FactorsCardiac ElectrophysiologyHeart VentriclesHeart Conduction SystemHeart-Assist DevicesSurvival RateCardiography, ImpedanceThoracotomyCardiomyopathy, DilatedMonitoring, AmbulatoryCardiac CatheterizationCerebral AngiographySurvival AnalysisVolunteersPericardiumElectrodesMitral Valve StenosisEsophageal and Gastric VaricesTherapy, Computer-AssistedCost-Benefit AnalysisFemoral VeinElectric Power Supplies