Atrial FlutterAtrial FibrillationVerapamilCatheter AblationHeart AtriaElectric CountershockAnti-Arrhythmia AgentsElectrocardiographyTreatment OutcomeChronic DiseasePulmonary VeinsCardiac Pacing, ArtificialPropafenoneAtrial AppendageElectrophysiologic Techniques, CardiacAmiodaroneHeart Conduction SystemTime FactorsWarfarinAtrial FunctionAnticoagulantsRefractory Period, ElectrophysiologicalAtrial Function, LeftRetrospective StudiesVentricular FibrillationAtrioventricular NodeTachycardia, ParoxysmalAutoantibodiesTricuspid ValveDigoxinCryosurgerySotalolSick Sinus SyndromeRecurrencePacemaker, ArtificialBody Surface Potential MappingElectrocardiography, AmbulatoryFollow-Up StudiesProcainamideHeart BlockArrhythmia, SinusThromboembolismFlecainidePericarditisHeart Valve DiseasesAtrial Premature ComplexesEchocardiography, TransesophagealTachycardia, SupraventricularAtrial Function, RightBundle of HisHeart RateMitral ValveProspective StudiesTachycardiaDisopyramideStrokeElectrophysiologyTachycardia, Ectopic AtrialDogsEchocardiographyArrhythmias, CardiacRisk FactorsCardiac Surgical ProceduresHeart DiseasesVena Cava, InferiorAction PotentialsWolff-Parkinson-White SyndromeEmbolismHeart FailureCoronary SinusAtrial Septumbeta-AlanineFluoroscopyPostoperative ComplicationsPredictive Value of TestsMitral Valve StenosisCardiac CathetersCalcium Channel BlockersEchocardiography, DopplerInternational Normalized RatioHeart VentriclesBepridilIncidenceSinoatrial NodeThrombosisHydrops FetalisHeart Valve Prosthesis ImplantationRisk AssessmentCardiac CatheterizationDefibrillators, ImplantableSurgery, Computer-AssistedTachycardia, VentricularHemorrhageTachycardia, Sinoatrial Nodal ReentryMyocardiumMyocardial ContractionBradycardiaMitral Valve InsufficiencyEquipment DesignEndocardium