PressureBlood PressureCell CycleHeartMyocytes, CardiacCardiac OutputMyocardial ContractionSystoleCardiac-Gated Imaging TechniquesDiastoleHeart RateHydrostatic PressureModels, CardiovascularElectrocardiographyHeart VentriclesHemodynamicsArrhythmias, CardiacBlood Flow VelocityVentricular Function, LeftDogsPulsatile FlowVentricular PressureTime FactorsCardiac VolumeEchocardiographyBlood Pressure DeterminationVentricular FunctionCardiac Surgical ProceduresCardiac Pacing, ArtificialMyocardiumMagnetic Resonance Imaging, CineCardiac CatheterizationHypertensionHeart DiseasesStroke VolumeDeath, Sudden, CardiacReproducibility of ResultsMenstrual CycleTransducers, PressureIntracranial PressureCoronary CirculationIntraocular PressurePulseBlood Pressure Monitoring, AmbulatoryFetal HeartCardiomegalyMitral ValveRegional Blood FlowPhonocardiographyVascular ResistanceHeart Function TestsEchocardiography, DopplerHeart FailureStress, MechanicalAtmospheric PressureAir PressurePericardiumImage Interpretation, Computer-AssistedElasticityVenous PressureCardiac TamponadeHeart AtriaArterial PressureProspective StudiesReference ValuesHeart Conduction SystemAlgorithmsCell Cycle ProteinsRespirationPressoreceptorsImage Processing, Computer-AssistedUltrasonography, DopplerFeasibility StudiesVagus NerveObserver VariationVentricular Dysfunction, LeftEchocardiography, Three-DimensionalAtrial FunctionImaging, Three-DimensionalPredictive Value of TestsEchocardiography, Doppler, ColorMyocardial InfarctionBlood VolumeHeart ArrestAortaElasticity Imaging TechniquesCentral Venous PressureSensitivity and SpecificityPulmonary Wedge PressureEndocardiumDisease Models, AnimalCineradiographyCardiovascular Physiological PhenomenaSympathetic Nervous SystemBiomechanical PhenomenaTreatment OutcomeHeart SoundsAntihypertensive AgentsForamen MagnumCardiomyopathy, Dilated