Paranasal Sinus DiseasesParanasal SinusesSinusitisMaxillary SinusCranial SinusesCavernous SinusSinus of ValsalvaCarotid SinusFrontal SinusSphenoid SinusCoronary SinusSinus Thrombosis, IntracranialSick Sinus SyndromeEthmoid SinusParanasal Sinus NeoplasmsTachycardia, SinusMaxillary Sinus NeoplasmsPilonidal SinusTransverse SinusesSuperior Sagittal SinusSymptom AssessmentSinoatrial NodeTreatment OutcomeDepressionCerebral VeinsSinus Arrest, CardiacSeverity of Illness IndexTomography, X-Ray ComputedFollow-Up StudiesAtrial FibrillationQuestionnairesTime FactorsElectrocardiographyProspective StudiesRhinitisEndoscopyBehavioral SymptomsPsychiatric Status Rating ScalesPetrosal Sinus SamplingLateral Sinus ThrombosisMagnetic Resonance ImagingCardiac Pacing, ArtificialDura MaterMaxillary SinusitisHistiocytosis, SinusHeart AtriaBradycardiaPrevalenceMucoceleChronic DiseaseRetrospective StudiesHeart RateCarotid-Cavernous Sinus FistulaSyncope