Sinus of ValsalvaValsalva ManeuverEchocardiographyEchocardiography, TransesophagealEchocardiography, DopplerEchocardiography, Three-DimensionalEchocardiography, StressEchocardiography, Doppler, ColorCranial SinusesMaxillary SinusParanasal SinusesEchocardiography, Doppler, PulsedAortic AneurysmCavernous SinusDobutamineCarotid SinusVentricular Function, LeftFrontal SinusVentricular Dysfunction, LeftParanasal Sinus DiseasesSphenoid SinusHeart Septal Defects, AtrialCoronary SinusCoronary Vessel AnomaliesHeart VentriclesMitral ValveHeart AtriaElectrocardiographyAortic ValveCardiac CatheterizationStroke VolumeHeart DiseasesMitral Valve InsufficiencyAortic Valve InsufficiencySick Sinus SyndromeHeart Valve DiseasesSinus Thrombosis, IntracranialPredictive Value of TestsEthmoid SinusSystoleSensitivity and SpecificityDiastoleHemodynamicsObserver VariationBlood Flow VelocityProspective StudiesHeart Defects, CongenitalMyocardial ContractionHeart SeptumExercise TestHeart NeoplasmsContrast MediaHeart Valve ProsthesisHeartTachycardia, SinusHeart RateHeart Septal Defects, VentricularCoronary CirculationAortic RuptureCardiotonic AgentsCardiac Surgical ProceduresCoronary AngiographyParanasal Sinus NeoplasmsHeart AneurysmFetal HeartFeasibility StudiesHeart Valve Prosthesis ImplantationReproducibility of ResultsBlood PressureEchocardiography, Four-DimensionalAortic Valve StenosisTreatment OutcomeHypertrophy, Left VentricularDilatation, PathologicHeart MurmursHeart FailureForamen Ovale, PatentTricuspid Valve InsufficiencyFollow-Up StudiesAtrial Function, LeftMyocardial InfarctionReplantationTomography, X-Ray ComputedTricuspid ValveAtrial FibrillationEndocarditisMitral Valve StenosisCardiomyopathiesFistulaMitral Valve ProlapseHeart Septal DefectsTime FactorsMyocardial IschemiaMaxillary Sinus NeoplasmsDipyridamoleCardiac VolumeVentricular RemodelingAutonomic Nervous SystemEmbolism, ParadoxicalVentricular Function, Right