Pacemaker, ArtificialDefibrillators, ImplantableDevice RemovalStaphylococcus lugdunensisCardiac Resynchronization Therapy DevicesProsthesis-Related InfectionsDeath, Sudden, CardiacArrhythmias, CardiacImplantable NeurostimulatorsTachycardia, VentricularEquipment FailureMyocytes, CardiacElectric CountershockVentricular FibrillationProstheses and ImplantsInfusion Pumps, ImplantableCardiac OutputCardiac Pacing, ArtificialElectrodes, ImplantedHeartEquipment DesignElectrocardiographyElectric InjuriesEquipment SafetyCardiac Surgical ProceduresSyncopeHeart FailureHeart ArrestAnti-Arrhythmia AgentsTelemetryHeart DiseasesEquipment Failure AnalysisTreatment OutcomeCardiomyopathiesCardiac Resynchronization TherapyFollow-Up StudiesAmiodaroneProsthesis ImplantationElectrocardiography, AmbulatoryElectric Power SuppliesTime FactorsHeart-Assist DevicesHeart VentriclesStroke VolumeElectrophysiologic Techniques, CardiacNeural ProsthesesVentricular Dysfunction, LeftAmplifiers, ElectronicRadio Frequency Identification DeviceMyocardiumCardiac CatheterizationCardiomyopathy, DilatedCardiomegalyCardiac TamponadeProspective StudiesHeart RateRetrospective StudiesCardiac ElectrophysiologyTachycardiaHeart TransplantationMyocardial ContractionMonitoring, AmbulatoryElectromagnetic PhenomenaRisk AssessmentMyocardial InfarctionEchocardiographyVentricular Function, LeftRisk FactorsPrimary PreventionHeart Conduction SystemCardiac Output, LowCatheters, IndwellingOut-of-Hospital Cardiac ArrestDeath, SuddenHemodynamicsMonitoring, PhysiologicMyocardial IschemiaMyoblasts, CardiacRemote Sensing TechnologyBrugada SyndromeCardiac MyosinsCardiac Imaging TechniquesWireless TechnologyVentricular DysfunctionAtrial FibrillationTachycardia, SupraventricularPredictive Value of TestsCardiomyopathy, HypertrophicCardiac GlycosidesVentricular RemodelingHeart Defects, CongenitalMiniaturizationSurvival RateHeart Function TestsMicro-Electrical-Mechanical SystemsKaplan-Meier EstimateAdrenergic beta-AntagonistsCardiac VolumeFeasibility StudiesElectric Stimulation Therapy