Atrial Function, LeftAtrial FunctionAtrial Function, RightDiastoleHeart AtriaEchocardiography, DopplerVentricular Function, LeftEchocardiography, Doppler, PulsedAtrial FibrillationVentricular Dysfunction, LeftEchocardiographyMyocardial ContractionStroke VolumeSystoleHeart Function TestsPericardiectomyElectric CountershockVentricular FunctionBlood Flow VelocityHemodynamicsHeart Failure, DiastolicHeart VentriclesEchocardiography, TransesophagealHypertrophy, Left VentricularObserver VariationEchocardiography, Doppler, ColorVentricular PressureMitral ValveHeartVentricular Function, RightVentricular RemodelingCardiomyopathy, HypertrophicMyocardiumBlood PressureHeart FailureVentricular DysfunctionCardiomyopathiesNatriuretic Peptide, BrainCardiac VolumeHypertensionHeart RateCardiac CatheterizationProspective StudiesHeart DiseasesVentricular Dysfunction, RightCardiomyopathy, RestrictiveCoronary CirculationAutonomic Nerve BlockTorsion, MechanicalElectrocardiographyAortic Valve StenosisDogsRadionuclide AngiographyFibrosisCineangiographyCardiomyopathy, DilatedCardiac Output, LowCardiotonic AgentsExercise TestExercise ToleranceTime FactorsKinetocardiographyMagnetic Resonance Imaging, CineThiadiazinesCanrenoneMyocardial IschemiaDobutamineComplianceReproducibility of ResultsCardiomegalyMyocardial InfarctionMasked HypertensionSarcoplasmic Reticulum Calcium-Transporting ATPasesGated Blood-Pool ImagingCardiac Pacing, Artificial