HemodynamicsHeart FailureMyocytes, CardiacCardiac OutputHeartCardiac Surgical ProceduresArrhythmias, CardiacBlood PressureDeath, Sudden, CardiacVascular ResistanceHeart RateCardiac CatheterizationCardiac Pacing, ArtificialBlood Flow VelocityMyocardiumRenal CirculationCardiomegalyMyocardial ContractionModels, CardiovascularCardiac TamponadeHeart VentriclesDogsRegional Blood FlowHeart DiseasesHeart ArrestTime FactorsVentricular Function, LeftEchocardiographyElectrocardiographyStroke VolumeCardiomyopathiesCardiac Output, LowPulmonary CirculationCerebrovascular CirculationVentricular RemodelingMyocardial InfarctionCoronary CirculationMyoblasts, CardiacBlood VolumeCardiac VolumeRats, Sprague-DawleyHeart Defects, CongenitalHypertension, PulmonaryHeart Function TestsCardiac MyosinsKidneyCardiac Imaging TechniquesTreatment OutcomeDisease Models, AnimalHeart TransplantationCardiac GlycosidesCardiotonic AgentsProspective StudiesOxygen ConsumptionOut-of-Hospital Cardiac ArrestCardiopulmonary ResuscitationCardiography, ImpedanceCardiomyopathy, DilatedPulsatile FlowVentricular Dysfunction, Left