The tricuspid valve is involved in right ventricular enlargement, carcinoid syndrome, rheumatic heart disease, and Loffler’s syndrome, which can cause tricuspid stenosis. Tricuspid regurgitation is common in endocarditis, especially in drug-addicted patients and in Ebstein’s anomaly. Pulmonary stenosis is common in Noonan’s syndrome, carcinoid syndrome, and rheumatic diseases. Congenital forms, especially subvalvular, are related to Fallot’s tetralogy. Pulmonary insufficiency is related to pulmonary hypertension, rheumatic disease, carcinoid syndrome, and endocarditis. Both the tricuspid valve and the pulmonary valve may be studied well by echocardiography.