Coronary Vessel AnomaliesFistulaCoronary SinusSinus of ValsalvaCoronary VesselsCoronary AngiographyArteriovenous FistulaArterio-Arterial FistulaCoronary CirculationCoronary Artery DiseaseAngioplasty, Balloon, CoronaryCoronary StenosisCoronary Artery BypassCranial SinusesMaxillary SinusCoronary DiseaseParanasal SinusesCardiac Pacing, ArtificialCavernous SinusElectrocardiographyCoronary AneurysmVena Cava, SuperiorCarotid SinusCoronary VasospasmHeart AtriaCatheter AblationFrontal SinusCardiac CatheterizationParanasal Sinus DiseasesSphenoid SinusDogsPacemaker, ArtificialHeart Conduction SystemMyocardial InfarctionTreatment OutcomeAtrial FibrillationCoronary ThrombosisAtrioventricular NodeElectrophysiologic Techniques, CardiacMyocardiumSinus Thrombosis, IntracranialHeart Arrest, InducedSick Sinus SyndromeAtrial FlutterHeartEthmoid SinusTachycardia, Sinoatrial Nodal ReentryCoronary RestenosisHemodynamicsMyocardial IschemiaBundle of HisTime FactorsCoronary OcclusionElectrodes, ImplantedFollow-Up StudiesAtrial FunctionCardiac Resynchronization Therapy DevicesProspective StudiesPercutaneous Coronary InterventionCardiac CathetersTomography, X-Ray ComputedParanasal Sinus NeoplasmsRisk FactorsPhlebographyTachycardia, Atrioventricular Nodal ReentryHeart VentriclesTachycardia, SupraventricularProsthesis ImplantationAtrial SeptumSinoatrial NodeTachycardia, SinusEchocardiographyCoronary Care UnitsDilatation, PathologicVeinsEchocardiography, TransesophagealWolff-Parkinson-White SyndromeBlood Flow VelocityBody Surface Potential MappingPredictive Value of TestsFluoroscopyFeasibility StudiesStentsHeart FailureTachycardia, ParoxysmalMaxillary Sinus NeoplasmsVasodilator AgentsBlood PressureHeart SeptumOxygen ConsumptionCardiopulmonary BypassMitral ValvePulmonary VeinsAdenosineTachycardia, Ectopic AtrialHeart BlockElectric CountershockMicrovascular AnginaCardiac Surgical ProceduresDipyridamole