Cardiac Complexes, PrematureMortalityMyocytes, CardiacHospital MortalityCardiac OutputInfant MortalityHeartCardiac Surgical ProceduresArrhythmias, CardiacCause of DeathDeath, Sudden, CardiacTime FactorsTreatment OutcomeRetrospective StudiesChild MortalityProspective StudiesFollow-Up StudiesHeart DiseasesMaternal MortalityCohort StudiesHeart FailureCardiomegalyCardiac Pacing, ArtificialMyocardial InfarctionCardiac TamponadeProportional Hazards ModelsCardiac CatheterizationMyocardiumSurvival AnalysisRisk AssessmentSurvival RateHeart ArrestMyocardial ContractionHeart VentriclesPrognosisCardiovascular DiseasesElectrocardiographyInfant, NewbornAge FactorsUnited StatesRisk FactorsPredictive Value of TestsCardiomyopathiesIncidencePostoperative ComplicationsEchocardiographyHeart RateMyoblasts, CardiacCardiac Imaging TechniquesCardiac Output, LowMortality, PrematureCardiac MyosinsHemodynamicsHeart TransplantationSex FactorsCardiac GlycosidesBlood PressureMyocardial IschemiaVentricular Function, LeftMultivariate AnalysisRegistriesPerinatal MortalityOut-of-Hospital Cardiac ArrestVentricular RemodelingTroponin IStroke VolumeHeart Defects, CongenitalKaplan-Meier EstimateCardiac VolumeAge DistributionBiological MarkersVentricular Dysfunction, LeftSeverity of Illness IndexDeath CertificatesCoronary DiseaseMorbiditySex DistributionFetal MortalityTroponin TLogistic ModelsDisease Models, AnimalLength of StayRiskCardiotonic AgentsHeart Function TestsCardiac Care FacilitiesCardiac Resynchronization TherapyRegression AnalysisNeoplasmsCoronary Artery BypassCardiopulmonary ResuscitationCardiomyopathy, DilatedHeart Conduction SystemLife ExpectancyDogsComorbidityPregnancyPoisson DistributionHeart NeoplasmsChi-Square Distribution