Circadian RhythmAtrial FibrillationElectric CountershockAnti-Arrhythmia AgentsCranial SinusesMaxillary SinusElectrocardiographyCatheter AblationHeart AtriaParanasal SinusesSinus of ValsalvaCavernous SinusAtrial FlutterHeart Conduction SystemCardiac Pacing, ArtificialCarotid SinusCoronary SinusFrontal SinusAtrial Function, LeftParanasal Sinus DiseasesAmiodaroneSphenoid SinusHeart RateSinoatrial NodeArrhythmia, SinusElectrophysiologic Techniques, CardiacPulmonary VeinsSick Sinus SyndromePeriodicityHeart BlockAtrial FunctionBiological ClocksTachycardia, ParoxysmalAtrial AppendageSuprachiasmatic NucleusAtrioventricular NodeSinus Thrombosis, IntracranialArrhythmias, CardiacBody Surface Potential MappingTachycardia, SupraventricularTachycardia, SinusPeriod Circadian ProteinsEthmoid SinusCircadian Rhythm Signaling Peptides and ProteinsTachycardiaTreatment OutcomeTachycardia, VentricularDigoxinActivity CyclesPacemaker, ArtificialSleep Disorders, Circadian RhythmPhotoperiodBepridilRecurrenceFlecainideParanasal Sinus NeoplasmsPropafenoneTime FactorsSotalolCircadian ClocksElectrocardiography, AmbulatoryProcainamideCLOCK ProteinsEchocardiography, TransesophagealAlpha RhythmBundle of HisTachycardia, Ectopic AtrialAtrial Function, RightMitral ValveFollow-Up StudiesBradycardiaMaxillary Sinus NeoplasmsARNTL Transcription FactorsElectrophysiologyMitral Valve StenosisTachycardia, Atrioventricular Nodal ReentryCardiac Complexes, PrematureAtrial Premature ComplexesRheumatic Heart DiseaseChronic DiseaseProspective StudiesEchocardiographyWolff-Parkinson-White SyndromeDogsEndocardiumHeart FailurePilonidal SinusChronobiology DisordersQuinidineAtrioventricular BlockAccelerated Idioventricular RhythmDarknessTransverse SinusesLightRefractory Period, ElectrophysiologicalThromboembolismHeart VentriclesAction PotentialsSuperior Sagittal SinusAprindine