Blood Flow VelocityDiastoleEchocardiography, DopplerMitral ValveEchocardiography, Doppler, PulsedVentricular Function, LeftVentricular Dysfunction, LeftPulmonary Wedge PressureSystoleEchocardiographyStroke VolumeAtrial Function, LeftEchocardiography, Doppler, ColorCoronary CirculationHemodynamicsHeart VentriclesMyocardial ContractionUltrasonography, Doppler, TranscranialVentricular PressureKentuckyRegional Blood FlowEchocardiography, TransesophagealBlood PressureCerebrovascular CirculationCardiac CatheterizationUltrasonography, DopplerHeart RateHeart FailureCardiomyopathy, DilatedPulsatile FlowMiddle Cerebral ArteryMitral Valve StenosisHeart DiseasesUltrasonography, Doppler, ColorLinear ModelsProspective StudiesOphthalmic ArteryRheologyTime FactorsCerebral ArteriesPredictive Value of TestsUltrasonography, Doppler, PulsedHeart SoundsModels, CardiovascularPhonocardiographyPulmonary VeinsMitral Valve InsufficiencyFlow CytometryUmbilical ArteriesLaser-Doppler FlowmetryReproducibility of ResultsAtrial FunctionVascular ResistanceCardiomyopathy, RestrictiveObserver VariationHeart AtriaRetinal ArteryUltrasonography, PrenatalEchoencephalographyCardiac OutputCoronary VesselsCiliary ArteriesSensitivity and SpecificityMicrocirculationHypocapniaPressureHeart Failure, DiastolicUltrasonographyNatriuretic Peptide, BrainHeart Rate, FetalPlacental CirculationReference ValuesArteriesHeart Function TestsCardiomyopathy, HypertrophicHyperemiaDogsDoppler EffectHyperventilationCarbon DioxideHemorheologyCarotid Artery, InternalHeartAtrial FibrillationGestational AgeRegression AnalysisFollow-Up StudiesAnterior Cerebral ArteryHypertrophy, Left VentricularFetal HeartElectrocardiographyRheumatic Heart DiseaseCardiac Pacing, ArtificialPregnancyFetal Growth RetardationPosterior Cerebral ArteryHypertensionElectric CountershockVasodilator AgentsHydrodynamics