Arrhythmias, CardiacCranial SinusesMaxillary SinusArrhythmia, SinusParanasal SinusesSinus of ValsalvaCavernous SinusCarotid SinusFrontal SinusParanasal Sinus DiseasesElectrocardiographySphenoid SinusCoronary SinusTachycardia, VentricularAnti-Arrhythmia AgentsSick Sinus SyndromeSinus Thrombosis, IntracranialEthmoid SinusTachycardia, SinusVentricular FibrillationHeart Conduction SystemAtrial FibrillationVentricular Premature ComplexesParanasal Sinus NeoplasmsTachycardiaElectrocardiography, AmbulatoryHeart RateCardiac Complexes, PrematureCatheter AblationCardiac Pacing, ArtificialMaxillary Sinus NeoplasmsAtrial FlutterTachycardia, SupraventricularDeath, Sudden, CardiacLong QT SyndromeHeart AtriaSinoatrial NodePilonidal SinusHeart VentriclesHeartElectric CountershockBradycardiaDefibrillators, ImplantableTransverse SinusesDogsElectrophysiologic Techniques, CardiacSuperior Sagittal SinusFlecainideHeart BlockSyncopePacemaker, ArtificialAction PotentialsMyocardiumVentricular DysfunctionTorsades de PointesNAV1.5 Voltage-Gated Sodium ChannelBody Surface Potential MappingTime FactorsDigitalis GlycosidesAtrioventricular NodeAmiodaroneMyocytes, CardiacModels, CardiovascularTreatment OutcomeFollow-Up StudiesMyocardial IschemiaElectrophysiologyAtrial Premature ComplexesSinus Arrest, CardiacPropafenoneCerebral VeinsMyocardial InfarctionTachycardia, Ectopic AtrialDeath, SuddenPericardiumAconitineAtrioventricular BlockMyocardial Reperfusion InjuryVoltage-Sensitive Dye ImagingProcainamidePulmonary VeinsEther-A-Go-Go Potassium ChannelsEncainideTelemetryEchocardiographyAutonomic Nervous SystemVagus NerveCardiac ElectrophysiologySotalolHeart FailureAtrial FunctionPetrosal Sinus SamplingTachycardia, ParoxysmalProspective StudiesQuinidineCardiomyopathiesRefractory Period, ElectrophysiologicalWolff-Parkinson-White SyndromeDisopyramideBlood Pressure