Carcinoid Heart DiseaseMitral ValveCarcinoid TumorMalignant Carcinoid SyndromeMitral Valve ProlapseMitral Valve InsufficiencyHeart Valve DiseasesMitral Valve StenosisTricuspid Valve StenosisHeartHeart ValvesTricuspid ValveAortic ValveTricuspid Valve InsufficiencyHydroxyindoleacetic AcidMitral Valve AnnuloplastyPulmonary ValveBioprosthesisHeart DiseasesEchocardiographyHeart RateChordae TendineaeHeart Defects, CongenitalRheumatic Heart DiseaseAortic Valve StenosisHeart Valve ProsthesisHeart Valve Prosthesis ImplantationHeart FailureAortic Valve InsufficiencyFollow-Up StudiesCoronary DiseaseEchocardiography, TransesophagealHeart AtriaCardiac Surgical ProceduresEchocardiography, Three-DimensionalIleal NeoplasmsMyocardial IschemiaTreatment OutcomeHeart TransplantationFetal HeartPhonocardiographyRisk FactorsBronchial NeoplasmsEchocardiography, Doppler