Atrial FibrillationCatheter AblationAnti-Arrhythmia AgentsElectric CountershockHeart AtriaVentricular FibrillationHeartPulmonary VeinsHeart RateElectrocardiographyCircadian RhythmCardiac Pacing, ArtificialHeart Conduction SystemWarfarinAtrial FlutterArrhythmias, CardiacAnticoagulantsPacemaker, ArtificialDefibrillators, ImplantableElectrocardiography, AmbulatoryElectrophysiologic Techniques, CardiacAmiodaroneAtrial AppendageTreatment OutcomeEuropeCardiologyThromboembolismAtrial FunctionAtrial Function, LeftStrokeRefractory Period, ElectrophysiologicalTachycardia, ParoxysmalRisk FactorsHeart FailureFollow-Up StudiesRecurrenceAtrial Premature ComplexesPropafenoneTime FactorsSocieties, MedicalBody Surface Potential MappingHeart DiseasesCardiac Imaging TechniquesProspective StudiesSotalolAtrioventricular NodeFlecainidebeta-AlanineFractalsSignal Processing, Computer-AssistedSick Sinus SyndromeInternational Normalized RatioEmbolismEchocardiography, TransesophagealTachycardia, VentricularCryosurgeryWolff-Parkinson-White SyndromeDevice RemovalDogsChronic DiseaseDigoxinBepridilEchocardiographyTachycardiaArrhythmia, SinusHeart BlockCardiac Surgical ProceduresTachycardia, Ectopic AtrialRisk AssessmentTachycardia, SupraventricularDeath, Sudden, CardiacAtrial Function, RightCardiac Resynchronization TherapyHemorrhageRetrospective StudiesIncidenceSinoatrial NodePredictive Value of TestsAtrial SeptumPractice Guidelines as TopicPostoperative ComplicationsBradycardiaHealth Care SurveysMitral ValveHeart ValvesHeart Valve DiseasesAspirinAdrenergic beta-AntagonistsProcainamideAction PotentialsModels, CardiovascularPericardiumHeart ArrestPhysician's Practice PatternsRheumatic Heart DiseaseElectrophysiologyStroke VolumeHeart Defects, CongenitalHeart TransplantationVentricular Dysfunction, Left