Cardiac VolumeEchocardiography, Four-DimensionalFetal HeartHeartHemodynamicsEchocardiography, Three-DimensionalStroke VolumeCardiac OutputMyocytes, CardiacBlood VolumeBlood PressureCardiac Surgical ProceduresHeart RateArrhythmias, CardiacVascular ResistanceBlood Flow VelocityTime FactorsDeath, Sudden, CardiacHeart FailureCardiac CatheterizationMyocardiumHeart VentriclesCardiac Pacing, ArtificialVentricular Function, LeftMyocardial ContractionDogsEchocardiographyRegional Blood FlowTreatment OutcomeProspective StudiesCardiomegalyCardiotonic AgentsCardiac TamponadeCatheterization, Swan-GanzModels, CardiovascularHeart DiseasesElectrocardiographyVentricular RemodelingHypertension, PulmonaryDisease Models, AnimalMyocardial InfarctionCerebrovascular CirculationPulmonary Wedge PressureRats, Sprague-DawleyOxygenHeart ArrestCoronary CirculationArterial PressureMagnetic Resonance ImagingVentricular Dysfunction, LeftAnesthesiaRats, WistarCardiomyopathy, DilatedPulmonary CirculationVentricular PressureReproducibility of ResultsCardiomyopathiesNatriuretic Peptide, BrainPulsatile FlowPlasma SubstitutesThermodilutionMonitoring, PhysiologicRetrospective StudiesOxygen ConsumptionSwineMyocardial IschemiaCardiac Output, LowPredictive Value of TestsDiastoleSystoleFollow-Up StudiesMyoblasts, CardiacHypotensionCentral Venous PressureEchocardiography, DopplerCardiac Imaging TechniquesCardiac MyosinsSplanchnic CirculationVentricular Function, RightDose-Response Relationship, DrugHeart TransplantationIsotonic SolutionsLaser-Doppler FlowmetryCardiac GlycosidesFluid TherapyAtrial Natriuretic FactorSensitivity and SpecificityAnalysis of VarianceModels, AnimalPulmonary ArteryMyocardial Reperfusion InjuryVasodilator AgentsHeart Defects, CongenitalHeart Function TestsPlasma VolumeInfusions, IntravenousTroponin IOut-of-Hospital Cardiac Arrest