Death, Sudden, CardiacArrhythmias, CardiacDeath, SuddenSudden Infant DeathSymptom AssessmentDepressionRisk FactorsQuestionnairesSeverity of Illness IndexTreatment OutcomeFollow-Up StudiesTime FactorsProspective StudiesPsychiatric Status Rating ScalesBehavioral SymptomsTachycardia, VentricularPrevalenceVentricular FibrillationRetrospective StudiesAutopsyDefibrillators, ImplantableCardiomyopathy, HypertrophicProne PositionQuality of LifeAffective SymptomsLong QT SyndromeAnxietyCross-Sectional StudiesSyncopeDepressive DisorderSyndromeStress Disorders, Post-TraumaticLongitudinal StudiesAge FactorsInfant, NewbornCohort StudiesPredictive Value of TestsFatigueIncidenceAsthmaCase-Control StudiesStress, PsychologicalMagnetic Resonance ImagingRespiration DisordersHeadacheRisk AssessmentSex Factors