Carcinoid Heart Disease on Echocardiogram (A4C) "Frozen" tricuspid valve with severe regurgitation. Carcinoid heart disease: Thickening, retraction and severe immobility of the right-sided valve leaflets. Ivan Stankovic, MD, PhD @Ivan_Echocardio #Carcinoid #Heart #Disease #frozen #tricuspid #valve #regurgitation #a4c #Echocardiogram #clinical #cardiology #pocus