Heart FailureStroke VolumeStrokeHeartHeart RateCardiac OutputHemodynamicsCardiac Output, LowVentricular Function, LeftBlood VolumeHeart Failure, SystolicBlood PressureTime FactorsTreatment OutcomeMyocardial ContractionMyocardiumHeart Failure, DiastolicProspective StudiesHeart DiseasesVentricular Dysfunction, LeftEchocardiographyCardiomyopathy, DilatedHeart Function TestsRisk FactorsFollow-Up StudiesBrain IschemiaChronic DiseaseNatriuretic Peptide, BrainHeart VentriclesCardiography, ImpedanceAdrenergic beta-AntagonistsVentricular RemodelingHeart TransplantationCardiotonic AgentsSystoleVascular ResistanceExercise TestTreatment FailureEchocardiography, DopplerDogsDiastoleOxygen ConsumptionCerebrovascular DisordersCardiac Pacing, ArtificialCardiac VolumeSeverity of Illness IndexHeart Defects, CongenitalMyocardial InfarctionThermodilutionFluid TherapyFetal HeartPredictive Value of TestsPrognosisPulmonary Wedge PressureRetrospective StudiesVentricular Function, RightHeart AtriaDisease Models, AnimalCardiomyopathiesAcute DiseaseCardiomegalyPropanolaminesVentricular PressureMagnetic Resonance ImagingBlood Flow VelocityHospitalizationCohort StudiesExercise ToleranceMyocytes, CardiacCardiovascular Physiological PhenomenaHeart-Assist DevicesDiureticsVentricular FunctionRisk AssessmentElectrocardiographyBiological MarkersVentricular DysfunctionReproducibility of ResultsHypovolemiaPlasma VolumeAngiotensin-Converting Enzyme InhibitorsExerciseCentral Venous PressureDouble-Blind MethodMonitoring, PhysiologicCardiac CatheterizationAtrial FibrillationMyocardial IschemiaSympathetic Nervous SystemRespirationMitral Valve InsufficiencyIncidenceModels, CardiovascularAtrial Natriuretic FactorProportional Hazards ModelsAge FactorsRecovery of FunctionPhysical ExertionHypertensionCerebral Hemorrhage