Sinus of ValsalvaValsalva ManeuverCranial SinusesMaxillary SinusParanasal SinusesCavernous SinusCarotid SinusFrontal SinusParanasal Sinus DiseasesSphenoid SinusCoronary SinusSinus Thrombosis, IntracranialSick Sinus SyndromeEthmoid SinusAortic AneurysmParanasal Sinus NeoplasmsTachycardia, SinusCoronary Vessel AnomaliesMaxillary Sinus NeoplasmsPilonidal SinusTransverse SinusesSuperior Sagittal SinusSinoatrial NodeAortic RuptureEchocardiography, TransesophagealElectrocardiographyReplantationHeart RateSinus Arrest, CardiacAutonomic Nervous SystemCerebral VeinsTomography, X-Ray ComputedAtrial FibrillationHeart AtriaFistulaPetrosal Sinus SamplingPressoreceptorsDilatation, PathologicHeart Septal Defects, AtrialCatheter AblationAortic Valve InsufficiencyLateral Sinus ThrombosisAortic ValveUterine ProlapsePelvic FloorBlood PressureCardiac Pacing, ArtificialAutonomic Nervous System DiseasesHeadache Disorders, SecondaryMaxillary SinusitisSyncopeHistiocytosis, SinusHeadache Disorders, PrimaryTreatment OutcomeEchocardiographyBradycardiaEndoscopyDura MaterCarotid-Cavernous Sinus FistulaEchocardiography, Doppler, ColorAortographyBaroreflexMucoceleOtorhinolaryngologic Surgical ProceduresCardiac CatheterizationPacemaker, ArtificialAneurysm, RupturedSupine PositionPneumocephalusHeart Conduction SystemHypotension, OrthostaticTilt-Table TestCardiac Surgical ProceduresButylscopolammonium BromideSinus PericraniiTachycardiaVascular FistulaReflexRhinitisHeart Septal Defects, VentricularAtrioventricular NodeCystoceleMagnetic Resonance ImagingCentral Nervous System Vascular MalformationsEmbolism, ParadoxicalHeart Septal DefectsPostureElectric CountershockUltrasonography, Doppler, TranscranialUrinary Incontinence, StressCoronary AngiographyRespirationHeart BlockHeart AneurysmPure Autonomic FailureHeartSinoatrial BlockForamen Ovale, PatentDogsPrimary Dysautonomias