Death, SuddenAutopsyDeath, Sudden, CardiacHeartCause of DeathSudden Infant DeathHeart RateCell DeathHeart FailureArrhythmias, CardiacHeart DiseasesCardiomyopathy, HypertrophicTachycardia, VentricularVentricular FibrillationFatal OutcomeElectrocardiographyDeathRisk FactorsHeart Defects, CongenitalHeart TransplantationLong QT SyndromeForensic PathologyDefibrillators, ImplantableHeart BlockElectrocardiography, AmbulatoryCardiomyopathiesFollow-Up StudiesSyncopeTime FactorsMyocardiumHeart ArrestMyocardial InfarctionAnti-Arrhythmia AgentsProspective StudiesCoronary Vessel AnomaliesRetrospective StudiesCardiomyopathy, DilatedFetal HeartAjmalineCoronary DiseaseMyocardial IschemiaHeart AtriaInfant, NewbornArrhythmogenic Right Ventricular DysplasiaNAV1.5 Voltage-Gated Sodium ChannelHeart ValvesIncidenceEchocardiographyHeart Conduction SystemSportsPrognosisTachycardiaKCNQ1 Potassium ChannelCardiac Complexes, PrematureRisk AssessmentTreatment OutcomeSyndromeAdrenergic beta-AntagonistsAmiodaroneFetal DeathBrugada SyndromeStroke VolumeSurvival AnalysisCardiomegalyCardiac Pacing, ArtificialAutonomic Nervous SystemBundle-Branch BlockMyocytes, CardiacCardiac Output, LowAge FactorsRiskEther-A-Go-Go Potassium ChannelsCohort StudiesVentricular Premature ComplexesPredictive Value of TestsHemodynamicsVentricular Dysfunction, LeftBrain DeathMyocardial ContractionVentricular DysfunctionHeart NeoplasmsDisease Models, AnimalDogsSurvival RateTetralogy of FallotVentricular Function, LeftJapanMyocarditisHypertrophy, Left VentricularMutationExercise TestHeart SeptumAtrioventricular NodeHeart Function TestsKCNQ Potassium ChannelsPedigreeAttitude to DeathPotassium Channels, Voltage-GatedAsphyxiaHeart Arrest, Induced