Death, Sudden, CardiacDeath, SuddenArrhythmias, CardiacDefibrillators, ImplantableElectrocardiographyTachycardia, VentricularVentricular FibrillationDeathLong QT SyndromeCardiomyopathy, HypertrophicBrugada SyndromeCause of DeathRisk FactorsHeart ArrestMyocardial InfarctionAnti-Arrhythmia AgentsMyocytes, CardiacHeart Conduction SystemElectric CountershockFollow-Up StudiesHeart DiseasesElectrocardiography, AmbulatoryRisk AssessmentCardiomyopathiesArrhythmogenic Right Ventricular DysplasiaHeartSyncopeProspective StudiesPredictive Value of TestsRomano-Ward SyndromeHeart FailureCell DeathAutopsyNAV1.5 Voltage-Gated Sodium ChannelTime FactorsSudden Infant DeathHeart RateMyocardiumDefibrillatorsCardiac Pacing, ArtificialElectrophysiologic Techniques, CardiacCardiomyopathy, Hypertrophic, FamilialAmiodaroneStroke VolumeKCNQ1 Potassium ChannelPrognosisMyocardial IschemiaTreatment OutcomeVentricular Dysfunction, LeftEchocardiographyRetrospective StudiesHeart VentriclesForensic PathologyIncidenceCoronary Artery DiseaseEther-A-Go-Go Potassium ChannelsCoronary Vessel AnomaliesProportional Hazards ModelsCardiomyopathy, DilatedCardiopulmonary ResuscitationAdrenergic beta-AntagonistsCoronary DiseaseAthletesKaplan-Meier EstimateAutonomic Nervous SystemAjmalineBrain DeathHospitals, StateCardiac OutputSportsSurvival AnalysisExercise TestSurvival RateBundle-Branch BlockChannelopathiesJervell-Lange Nielsen SyndromeMyocardial BridgingPrecipitating FactorsRiskVentricular Function, LeftCohort StudiesTachycardiaHypertrophy, Left VentricularCardiac Surgical ProceduresSyndromeVentricular Premature ComplexesTroponin TUnited StatesMultivariate AnalysisDextropropoxypheneDogsPrimary PreventionMutationCoronary AngiographyCardiomegalyCase-Control StudiesThoracic InjuriesVentricular DysfunctionOut-of-Hospital Cardiac ArrestMyocardial Contraction