ElectrocardiographyHeart Defects, CongenitalHeart DiseasesEchocardiographyArrhythmias, CardiacCardiovascular AbnormalitiesHeartElectrocardiography, AmbulatoryCardiomyopathiesMyocytes, CardiacDeath, Sudden, CardiacHypertrophy, Left VentricularMitral Valve ProlapseHeart Septal DefectsMusculoskeletal AbnormalitiesHeart VentriclesFetal HeartVentricular Dysfunction, LeftMyocardiumCardiomyopathy, AlcoholicAbnormalities, MultipleEchocardiography, DopplerExercise TestProspective StudiesHeart Valve DiseasesVentricular Function, LeftUltrasonography, PrenatalMagnetocardiographyCardiac OutputHeart Septal Defects, VentricularPredictive Value of TestsCardiomyopathy, DilatedHeart AtriaHeart AneurysmAutopsyTime FactorsCardiomegalyMyocardial InfarctionFollow-Up StudiesPulmonary Valve StenosisRisk FactorsCardiac Surgical ProceduresHeart RateVectorcardiographyHeart Conduction SystemStroke VolumePregnancyInfant, NewbornSyndromeRetrospective StudiesHeart Septal Defects, AtrialSignal Processing, Computer-AssistedFetal DiseasesMyocardial IschemiaBlood PressureChest PainCardiac Pacing, ArtificialSensitivity and SpecificityPrevalenceCoronary DiseaseCardiac CatheterizationCoronary AngiographyHeart AuscultationGestational AgeMyocardial ContractionCase-Control StudiesPhenotypeHeart BlockCardiovascular DiseasesPedigreeHeart FailureDobutamineDipyridamoleTroponin TPrognosisHeart Function TestsMutationCross-Sectional StudiesThalliumKinetocardiographyMonitoring, PhysiologicCardiologyCardiomyopathy, HypertrophicTreatment OutcomeHemodynamicsCardiotocographyAtrial FibrillationBradycardiaTachycardia, VentricularMice, KnockoutSyncopePeripartum PeriodTachycardia, SinusCardiac TamponadeTelemetryAngina PectorisCardiotonic AgentsTroponin IVentricular Premature ComplexesRadionuclide Ventriculography