Renal CirculationRenal ArterySplanchnic CirculationKidneyVascular ResistanceVasoconstrictionRegional Blood FlowHemodynamicsReninBlood PressureAngiotensin IIMyocytes, CardiacNitric OxideVasodilationBlood CirculationCardiac OutputHeartCardiac Surgical ProceduresArrhythmias, CardiacExtracorporeal CirculationDeath, Sudden, CardiacPulmonary CirculationHeart ArrestCardiomegalyCardiac Pacing, ArtificialCardiac TamponadeHeart DiseasesCardiac CatheterizationMyocardiumCoronary CirculationMyocardial ContractionCollateral CirculationHeart VentriclesTime FactorsHeart RateHeart FailureElectrocardiographyEnterohepatic CirculationCardiomyopathiesMyoblasts, CardiacOut-of-Hospital Cardiac ArrestCerebrovascular CirculationDogsCardiopulmonary ResuscitationCardiac MyosinsCardiac Imaging TechniquesEchocardiographyCardiac GlycosidesCardiac Output, LowMyocardial InfarctionHeart Defects, CongenitalVentricular Function, LeftHeart TransplantationCardiac VolumePlacental CirculationVentricular RemodelingTroponin ITreatment OutcomeRats, Sprague-DawleyModels, CardiovascularBlood Circulation TimeLiver CirculationDisease Models, AnimalStroke VolumeHeart Function TestsTroponin TBlood Flow VelocityProspective StudiesMyocardial IschemiaCardiac Resynchronization TherapyCardiopulmonary BypassHeart Conduction SystemFetal HeartCardiotonic AgentsCells, CulturedVentricular Dysfunction, LeftCardiomyopathy, DilatedHeart NeoplasmsCardiac Care Facilities