Tachycardia, SupraventricularMyocardial InfarctionTachycardiaTachycardia, VentricularTachycardia, ParoxysmalElectrocardiographyTachycardia, Atrioventricular Nodal ReentryTachycardia, SinusTachycardia, Ectopic AtrialCatheter AblationArrhythmias, CardiacAnti-Arrhythmia AgentsInfarctionTachycardia, Ectopic JunctionalAtrioventricular NodeHeart Conduction SystemWolff-Parkinson-White SyndromeTreatment OutcomeTime FactorsAtrial Premature ComplexesCardiac Pacing, ArtificialElectrophysiologic Techniques, CardiacCerebral InfarctionBundle of HisAngioplasty, Balloon, CoronaryElectrocardiography, AmbulatoryFlecainideHydrops FetalisAtrial FlutterThrombolytic TherapyProspective StudiesFollow-Up StudiesCoronary AngiographyRisk FactorsHeart RateAnterior Wall Myocardial InfarctionCardiac Complexes, PrematureAmiodaroneTachycardia, Sinoatrial Nodal ReentryMyocardial ReperfusionRecurrenceVentricular RemodelingDigoxinEchocardiographyAtrial FibrillationVentricular FibrillationHeart VentriclesMyocardiumRetrospective StudiesPostural Orthostatic Tachycardia SyndromeVentricular Function, LeftPre-Excitation SyndromesStreptokinasePrognosisBody Surface Potential MappingHeartAccessory Atrioventricular BundlePredictive Value of TestsCreatine KinaseTachycardia, ReciprocatingDeath, Sudden, CardiacDefibrillators, ImplantableCoronary DiseaseCoronary Care UnitsHeart AtriaFetal DiseasesVentricular Premature ComplexesHeart BlockAdrenergic beta-AntagonistsCardiac CatheterizationFibrinolytic AgentsElectric CountershockAngina PectorisIncidenceHemodynamicsMyocardial IschemiaVentricular Dysfunction, LeftStroke VolumePlatelet Aggregation InhibitorsHeart FailureAngina, UnstableRisk AssessmentCoronary VesselsSotalolBundle-Branch BlockMyocardial RevascularizationElectrocoagulationStentsProcainamideCoronary CirculationPercutaneous Coronary InterventionAtrioventricular BlockShock, CardiogenicCoronary ThrombosisCoronary Artery DiseaseProportional Hazards ModelsHospital MortalityAcute DiseaseInferior Wall Myocardial InfarctionDogs