Heart Valve DiseasesHeartHeart ValvesPhentermineFenfluramineDexfenfluramineHeart RateRheumatic Heart DiseasePergolideHeart Valve ProsthesisHeart Valve Prosthesis ImplantationHeart FailureAortic Valve InsufficiencyHeart DiseasesMitral Valve InsufficiencyReceptor, Serotonin, 5-HT2BAortic Valve StenosisMitral ValveAppetite DepressantsMitral Valve StenosisAortic ValveNorfenfluramineHeart Defects, CongenitalAlkaptonuriaOchronosisEchocardiographyAtrial FibrillationHeart AtriaSerotonin 5-HT2 Receptor AgonistsBioprosthesisHomogentisic AcidEndocarditis, BacterialTricuspid Valve InsufficiencyHeart TransplantationRheumatic FeverEndocarditisEndocarditis, Subacute BacterialCarcinoid Heart DiseaseErgolinesSerotonin AgentsTricuspid ValveCardiac CatheterizationFetal HeartRisk FactorsCryosurgeryTime FactorsPregnancy Complications, CardiovascularFollow-Up StudiesCardiac Surgical ProceduresProspective StudiesTreatment OutcomeCoronary DiseaseCardiomyopathiesHemodynamicsPulmonary Wedge PressureVentricular Function, LeftEchocardiography, TransesophagealRisk AssessmentStroke VolumeMucocutaneous Lymph Node SyndromeHeart BlockCalcinosisChronic DiseaseEchocardiography, DopplerEchocardiography, Doppler, ColorRetrospective StudiesAge FactorsMyocardiumHeart Arrest, InducedHeart Function TestsCohort StudiesMyocardial ContractionElectrocardiographyPredictive Value of TestsSeverity of Illness IndexAnticoagulantsMyocardial IschemiaPrognosisIncidenceMyocytes, CardiacComorbidityPostoperative ComplicationsCatheter AblationPrevalenceSurvival RateCardiac Output, LowHeart, ArtificialHeart Failure, SystolicPerfusionCardiomyopathy, DilatedCardiomegalyCoronary Artery DiseaseMyocardial InfarctionHeart InjuriesHeart Rate, FetalHeart SeptumCardiotonic AgentsMyocardial Reperfusion InjuryHeart ArrestHeart Ventricles