Mitral Valve InsufficiencyRheumatic Heart DiseaseMitral ValveAortic Valve InsufficiencyHeart Valve DiseasesTricuspid Valve InsufficiencyPulmonary Valve InsufficiencyRheumatic DiseasesAortic ValveMitral Valve ProlapseVenous ValvesMitral Valve StenosisRheumatic FeverHeart Valve Prosthesis ImplantationHeart Valve ProsthesisCardiac Surgical ProceduresMitral Valve AnnuloplastyAortic Valve StenosisHeart ValvesChordae TendineaeTreatment OutcomeAdrenal InsufficiencyEchocardiographyPhentermineEndocarditisEndocarditis, BacterialTricuspid ValveAntistreptolysinBioprosthesisPulmonary ValveFenfluramineVenous InsufficiencyRenal InsufficiencyEchocardiography, TransesophagealHeart AtriaEchocardiography, DopplerHeart DiseasesAtrial FibrillationExocrine Pancreatic InsufficiencyEchocardiography, Three-DimensionalAppetite DepressantsCardiac Valve AnnuloplastyCalcinosisFollow-Up StudiesPlacental InsufficiencyEchocardiography, Doppler, ColorPhonocardiographyCardiomyopathies