Coronary SinusHeart AtriaCoronary VesselsCoronary AngiographyCoronary CirculationSinus of ValsalvaCoronary Artery DiseaseAtrial Function, RightAtrial FunctionVena Cava, SuperiorCardiac Pacing, ArtificialAngioplasty, Balloon, CoronaryHeart Conduction SystemElectrocardiographyCatheter AblationCoronary StenosisCoronary Artery BypassAtrial FibrillationAtrial FlutterDogsCranial SinusesMaxillary SinusElectrophysiologic Techniques, CardiacCoronary DiseaseCoronary Vessel AnomaliesCardiac CatheterizationParanasal SinusesHeartPacemaker, ArtificialSinoatrial NodeCavernous SinusCoronary AneurysmHeart NeoplasmsAtrioventricular NodeCarotid SinusCoronary VasospasmMyocardiumBundle of HisTreatment OutcomeFrontal SinusEchocardiography, TransesophagealParanasal Sinus DiseasesSphenoid SinusFistulaEchocardiographySick Sinus SyndromePulmonary VeinsBody Surface Potential MappingVena Cava, InferiorHeart VentriclesAtrial SeptumHemodynamicsTachycardia, Sinoatrial Nodal ReentryMyocardial ContractionHeart Arrest, InducedTomography, X-Ray ComputedTachycardia, Atrioventricular Nodal ReentryTime FactorsTachycardia, SupraventricularMyocardial InfarctionHeart SeptumCoronary ThrombosisHeart RateFollow-Up StudiesTachycardiaTricuspid ValveHeart BlockSinus Thrombosis, IntracranialMyocardial IschemiaTachycardia, Ectopic AtrialElectrodes, ImplantedCardiac Surgical ProceduresTachycardia, ParoxysmalProspective StudiesTachycardia, SinusHeart Septal Defects, AtrialFluoroscopyPhlebographyEthmoid SinusCoronary RestenosisRefractory Period, ElectrophysiologicalVentricular Function, RightEndocardiumWolff-Parkinson-White SyndromeCardiopulmonary BypassElectric CountershockDilatation, PathologicCoronary OcclusionVascular FistulaPericardiumBlood PressureVeinsHeart FailureRisk FactorsCardiac CathetersCardiac Resynchronization Therapy DevicesPercutaneous Coronary InterventionMitral ValveFeasibility StudiesHeart Defects, Congenital