Tachycardia, VentricularVentricular Premature ComplexesArrhythmogenic Right Ventricular DysplasiaCatheter AblationVentricular Outflow ObstructionElectrocardiographyTachycardiaPulmonary ValveCardiomyopathy, HypertrophicTetralogy of FallotHeart SeptumAortic Stenosis, SubvalvularPulmonary Valve InsufficiencyHeart VentriclesTachycardia, SupraventricularHeart Defects, CongenitalEchocardiographyPulmonary Valve StenosisHeart Septal Defects, VentricularPulmonary Subvalvular StenosisTransposition of Great VesselsHeart NeoplasmsVentricular SeptumHeart Valve Prosthesis ImplantationTachycardia, Atrioventricular Nodal ReentryCardiac CatheterizationVentricular Function, RightCardiac Surgical ProceduresPulmonary AtresiaAortic ValveHeart Conduction SystemVentricular Dysfunction, RightMitral ValveEchocardiography, DopplerCardiac Pacing, ArtificialTachycardia, ParoxysmalSinus of ValsalvaDiscrete Subaortic StenosisTachycardia, Ectopic AtrialElectrophysiologic Techniques, CardiacTachycardia, SinusHeart Valve ProsthesisHeart Septal DefectsAortic Valve StenosisBody Surface Potential MappingFetal HeartTreatment OutcomeAortic Valve InsufficiencyBrugada SyndromeAnti-Arrhythmia AgentsFollow-Up StudiesBioprosthesisPericardiumHeartVentricular FibrillationEndocardiumEchocardiography, TransesophagealEchocardiography, Doppler, ColorBundle-Branch BlockDouble Outlet Right VentriclePacemaker, ArtificialHemodynamicsPulmonary ArteryEchocardiography, Three-DimensionalTachycardia, Ectopic JunctionalCatheterizationAortic CoarctationMitral Valve InsufficiencyAngiocardiographyMyxomaVentricular Function, LeftInfant, NewbornArrhythmias, CardiacRetrospective StudiesDisopyramideAtrioventricular BlockPostural Orthostatic Tachycardia SyndromeTime FactorsHeart Valve DiseasesReoperationHeart RateHeart AtriaElectrocardiography, AmbulatoryCardiac Valve AnnuloplastyTachycardia, ReciprocatingHeart BlockTachycardia, Sinoatrial Nodal ReentryStroke VolumeSyncopeEchocardiography, StressExercise TestAccelerated Idioventricular RhythmFibromaBlood Flow VelocityProspective StudiesMyocardiumPostoperative ComplicationsVentricular Dysfunction, LeftDeath, Sudden, CardiacMagnetic Resonance Imaging, Cine