Heart SoundsAtrial FibrillationHeart AuscultationPhonocardiographyHeart MurmursSoundHeart AtriaCatheter AblationKinetocardiographyVentricular FibrillationAnti-Arrhythmia AgentsHeartPulmonary VeinsElectric CountershockStethoscopesElectrocardiographyWarfarinAtrial FlutterAnticoagulantsHeart RateElectrophysiologic Techniques, CardiacAtrial AppendageAmiodaroneCardiac Pacing, ArtificialHeart Conduction SystemHeart FailureTreatment OutcomeHeart DiseasesSignal Processing, Computer-AssistedMitral ValveThromboembolismStrokeSound LocalizationAtrial FunctionRefractory Period, ElectrophysiologicalAtrial Function, LeftTachycardia, ParoxysmalFollow-Up StudiesRecurrenceHeart Valve DiseasesElectrocardiography, AmbulatoryAtrial Premature ComplexesMitral Valve StenosisTime FactorsPropafenoneRisk FactorsEchocardiographyCineangiographyBody Surface Potential MappingProspective StudiesPacemaker, ArtificialSotalolbeta-AlanineFlecainideAtrioventricular NodeMitral Valve InsufficiencySick Sinus SyndromeInternational Normalized RatioEmbolismEchocardiography, TransesophagealCryosurgeryWolff-Parkinson-White SyndromeSound SpectrographyDogsArrhythmias, CardiacChronic DiseaseStroke VolumeTachycardiaVentricular Function, Left