Atrial FlutterCatheter AblationStroke VolumeElectrocardiographyAtrial FibrillationVentricular Function, LeftTricuspid ValveVentricular Dysfunction, LeftHeart AtriaCardiac Pacing, ArtificialAnti-Arrhythmia AgentsElectrophysiologic Techniques, CardiacPropafenoneHeart FailureHeart BlockElectric CountershockPericarditisEchocardiographyProcainamideHeart Conduction SystemBody Surface Potential MappingAtrial Function, RightTreatment OutcomeFollow-Up StudiesHeart VentriclesTachycardia, SupraventricularGated Blood-Pool ImagingAmiodaroneProspective StudiesTachycardiaFlecainideVena Cava, InferiorDisopyramideAtrial Function, LeftTime FactorsAtrial FunctionSystoleEchocardiography, DopplerCardiac VolumeMyocardial InfarctionArrhythmias, CardiacCardiomyopathy, DilatedHeartHeart DiseasesVentricular RemodelingRefractory Period, ElectrophysiologicalRadionuclide VentriculographyCardiac CatheterizationAtrial Premature ComplexesRadionuclide AngiographyDiastoleTachycardia, ParoxysmalElectrocardiography, AmbulatoryTachycardia, Ectopic AtrialPredictive Value of TestsRecurrenceCryosurgeryMyocardial ContractionPulmonary VeinsCardiomyopathiesHeart RateHemodynamicsEchocardiography, Three-DimensionalRetrospective StudiesHydrops FetalisHypertrophy, Left VentricularElectrophysiologyAtrioventricular NodeCoronary SinusPrognosisMyocardiumHeart Function TestsVentricular Function, RightDogsEchocardiography, TransesophagealMilk EjectionExercise TestSick Sinus SyndromePacemaker, ArtificialNatriuretic Peptide, BrainFluoroscopyVentriculography, First-PassMagnetic Resonance Imaging, CineTachycardia, VentricularDigoxinDefibrillators, ImplantableRisk FactorsCardiac CathetersHeart Failure, DiastolicPostoperative ComplicationsChronic DiseaseCardiac Output, LowButylscopolammonium BromideCardiac Surgical ProceduresEndocardiumAtrial AppendageSeverity of Illness IndexTachycardia, Sinoatrial Nodal ReentryCardiac OutputMitral Valve