Atrial FibrillationAtrial FlutterVentricular FibrillationElectric CountershockCatheter AblationHeart AtriaAnti-Arrhythmia AgentsElectrocardiographyCardiac Pacing, ArtificialPulmonary VeinsElectrophysiologic Techniques, CardiacHeart Conduction SystemAmiodaroneChronic DiseasePropafenoneAtrial AppendageWarfarinRefractory Period, ElectrophysiologicalAtrial FunctionAnticoagulantsAtrial Function, LeftBody Surface Potential MappingTreatment OutcomeArrhythmias, CardiacAtrioventricular NodeTachycardia, ParoxysmalHeart ArrestElectrocardiography, AmbulatoryRecurrenceProcainamideSotalolPacemaker, ArtificialFollow-Up StudiesFlecainideSick Sinus SyndromeCryosurgeryTachycardiaTricuspid ValveTime FactorsTachycardia, VentricularCardiopulmonary ResuscitationDigoxinHeart RateThromboembolismHeart BlockDogsArrhythmia, SinusAtrial Premature ComplexesDefibrillators, ImplantableProspective StudiesHeart Valve DiseasesTachycardia, SupraventricularEchocardiography, TransesophagealPericarditisDefibrillatorsAtrial Function, RightDisopyramideMitral ValveElectrophysiologyStrokeBundle of HisRisk FactorsAction PotentialsHeart DiseasesTachycardia, Ectopic AtrialRetrospective StudiesEchocardiographyCardiac Surgical ProceduresHeart VentriclesCardiac Complexes, PrematureWolff-Parkinson-White SyndromeDeath, Sudden, CardiacBrugada SyndromePericardiumEndocardiumPredictive Value of TestsHeart FailureEmbolismbeta-AlanineHeartResuscitationPostoperative ComplicationsVena Cava, InferiorAtrial SeptumIncidenceModels, CardiovascularInternational Normalized RatioCoronary SinusRisk AssessmentMyocardiumFluoroscopyMitral Valve StenosisCardiac CathetersEchocardiography, DopplerHeart MassageBepridilMyocardial InfarctionSinoatrial NodeEpicardial MappingSwine