Coronary SinusCoronary VesselsCoronary AngiographyCoronary CirculationCoronary Artery DiseaseSinus of ValsalvaAngioplasty, Balloon, CoronaryCoronary StenosisCoronary Artery BypassCranial SinusesMaxillary SinusCoronary DiseaseParanasal SinusesCardiac Pacing, ArtificialCavernous SinusCoronary Vessel AnomaliesElectrocardiographyCoronary AneurysmVena Cava, SuperiorCarotid SinusCoronary VasospasmHeart AtriaCatheter AblationCardiac CatheterizationFrontal SinusDogsParanasal Sinus DiseasesSphenoid SinusPacemaker, ArtificialHeart Conduction SystemTreatment OutcomeMyocardial InfarctionAtrial FibrillationMyocardiumAtrioventricular NodeCoronary ThrombosisElectrophysiologic Techniques, CardiacSinus Thrombosis, IntracranialHeart Arrest, InducedSick Sinus SyndromeAtrial FlutterHeartTime FactorsHemodynamicsEthmoid SinusTachycardia, Sinoatrial Nodal ReentryCoronary RestenosisMyocardial IschemiaBundle of HisCoronary OcclusionElectrodes, ImplantedFollow-Up StudiesAtrial FunctionCardiac Resynchronization Therapy DevicesProspective StudiesPercutaneous Coronary InterventionRisk FactorsTomography, X-Ray ComputedCardiac CathetersParanasal Sinus NeoplasmsPhlebographyHeart VentriclesTachycardia, Atrioventricular Nodal ReentryTachycardia, SupraventricularProsthesis ImplantationAtrial SeptumSinoatrial NodeEchocardiographyTachycardia, SinusCoronary Care UnitsDilatation, PathologicBlood Flow VelocityVeinsEchocardiography, TransesophagealWolff-Parkinson-White SyndromePredictive Value of TestsBody Surface Potential MappingFeasibility StudiesFluoroscopyStentsHeart FailureBlood PressureVasodilator AgentsTachycardia, ParoxysmalMaxillary Sinus NeoplasmsOxygen ConsumptionHeart SeptumCardiopulmonary BypassMitral ValveArteriovenous FistulaPulmonary VeinsAdenosineTachycardia, Ectopic AtrialVascular ResistanceElectric CountershockHeart BlockMicrovascular AnginaEquipment DesignDipyridamoleRetrospective Studies