Sinus of ValsalvaValsalva ManeuverCranial SinusesMaxillary SinusParanasal SinusesCavernous SinusCarotid SinusAortic AneurysmFrontal SinusParanasal Sinus DiseasesSphenoid SinusCoronary SinusCoronary Vessel AnomaliesSinus Thrombosis, IntracranialSick Sinus SyndromeEthmoid SinusParanasal Sinus NeoplasmsTachycardia, SinusAortic RuptureReplantationEchocardiography, TransesophagealMaxillary Sinus NeoplasmsAutonomic Nervous SystemPilonidal SinusTransverse SinusesUterine ProlapseSuperior Sagittal SinusHeart RatePelvic FloorHeadache Disorders, SecondaryAortic Valve InsufficiencyDilatation, PathologicAutonomic Nervous System DiseasesAortic ValveHeart Septal Defects, AtrialHeadache Disorders, PrimaryElectrocardiographyFistulaSinoatrial NodeTomography, X-Ray ComputedBlood PressureAortographyEchocardiography, Doppler, ColorEchocardiographyAneurysm, RupturedHypotension, OrthostaticSupine PositionBaroreflexHeart AtriaCystoceleSinus Arrest, CardiacEmbolism, ParadoxicalCardiac CatheterizationCerebral VeinsPressoreceptorsButylscopolammonium BromideUrinary Incontinence, StressCatheter AblationHeart Septal Defects, VentricularPneumocephalusTilt-Table TestVascular FistulaCardiac Surgical ProceduresPostureTreatment OutcomeHeart Septal DefectsPure Autonomic FailureUltrasonography, Doppler, TranscranialSyncopeAtrial FibrillationForamen Ovale, PatentPrimary DysautonomiasHeart AneurysmRectoceleUrodynamicsSuburethral SlingsEustachian TubeCoronary AngiographyPetrosal Sinus SamplingReflexLateral Sinus ThrombosisRespirationMaximal Voluntary VentilationKinetocardiographyAneurysm, FalseCardiac Pacing, ArtificialTachycardiaSeptal Occluder DeviceMaxillary SinusitisHistiocytosis, SinusMagnetic Resonance Imaging