Death, Sudden, CardiacElectrocardiographyDeath, SuddenArrhythmias, CardiacMyocardial InfarctionVentricular FibrillationAngina Pectoris, VariantTachycardia, VentricularHeartBrugada SyndromeMyocytes, CardiacDefibrillators, ImplantableSyndromeSudden Infant DeathStrontium RadioisotopesCerium RadioisotopesHeart Conduction SystemBundle-Branch BlockTime FactorsAnti-Arrhythmia AgentsYtterbiumCoronary AngiographyHeart ArrestAjmalineHeart RateLong QT SyndromeStreptokinaseHeart VentriclesCoronary VasospasmMyocardiumErgonovineRisk FactorsElectrocardiography, AmbulatoryPredictive Value of TestsCardiomyopathy, HypertrophicNAV1.5 Voltage-Gated Sodium ChannelProspective StudiesCardiac OutputThrombolytic TherapyTreatment OutcomeCreatine KinaseRisk AssessmentEchocardiographyCoronary VesselsDefibrillatorsMyocardial IschemiaHeart DiseasesCoronary DiseaseFollow-Up StudiesMexiletinePrognosisCardiomyopathiesProcainamideAngioplasty, Balloon, CoronaryStroke VolumeElectric CountershockDogsNicorandilCoronary CirculationExercise TestMyocardial ReperfusionCardiac Surgical ProceduresCardiac Pacing, ArtificialHirudin TherapyMyocardial ContractionCardiopulmonary ResuscitationDisopyramideChest PainVentricular Function, LeftVentricular Dysfunction, LeftIsosorbide DinitrateHeart FailureRetrospective StudiesAngina, UnstableCardiac CatheterizationColicArrhythmogenic Right Ventricular DysplasiaBlood PressureSyncopeCoronary Artery DiseasePractololAutopsyAcute Coronary SyndromeCardiomegalyHemodynamicsSensitivity and SpecificityCardiac ElectrophysiologyRomano-Ward SyndromeAngina PectorisKCNQ1 Potassium ChannelBiological MarkersElectrophysiologic Techniques, CardiacSodium ChannelsCardiomyopathy, DilatedPericardiumAcute DiseaseCoronary Vessel AnomaliesRecurrenceEther-A-Go-Go Potassium ChannelsOut-of-Hospital Cardiac Arrest