Heart-Assist DevicesHeart FailureHeart TransplantationProsthesis ImplantationShock, CardiogenicProsthesis DesignCardiomyopathy, DilatedVentricular Function, LeftDevice RemovalEquipment DesignAssisted CirculationEquipment FailureHemodynamicsTreatment OutcomeVentricular Dysfunction, RightHeart VentriclesVentricular Dysfunction, LeftCardiomyopathiesIntra-Aortic Balloon PumpingClenbuterolHydrodynamicsExtracorporeal Membrane OxygenationWaiting ListsPulsatile FlowSternotomyRetrospective StudiesTime FactorsSelf-Help DevicesProsthesis-Related InfectionsHeart DiseasesStroke VolumeAnterior Wall Myocardial InfarctionCardiac Surgical ProceduresPreoperative PeriodRecovery of FunctionEquipment SafetyHeart, ArtificialEchocardiography, TransesophagealMyocardiumPhonocardiographyVentricular Function, RightThrombosisMiniaturizationFatal OutcomeVentricular RemodelingFollow-Up StudiesSurvival AnalysisCardiopulmonary BypassRisk AssessmentPostoperative CareSeverity of Illness IndexCompassionate Use TrialsCardiovascular AgentsProsthesis FailurePulmonary Wedge PressureMyocytes, CardiacCardiac OutputSurvival RateQuality of LifeBiomedical EngineeringHemorrhageEchocardiographyAnticoagulantsVentricular PressurePostoperative ComplicationsKaplan-Meier EstimateRisk FactorsFeasibility StudiesProspective StudiesCost SavingsMyocardial ContractionTachycardia, VentricularCatheterizationPredictive Value of TestsAortic ValveProduct Surveillance, PostmarketingEchocardiography, DopplerCardiac Output, LowUnited StatesMyocardial IschemiaCathetersHospital MortalityComputer-Aided DesignBlood PressureCardiovascular InfectionsCohort StudiesModels, CardiovascularPatient SelectionCause of Death