Pathology of pulmonic valve stenosis and pure regurgitation

摘要: Little morphologic information is available on operatively excised pulmonic valves. The causes of stenosis are limited to a few conditions: (1) rheumatic and (2) non-rheunatic (congenital, carcinoid, infective endocarditis). Congenital constitute well over 95% these conditions. types include acommissural dome-shaped, dysplastic, bicuspid. Rare acquired rheumatic, endocarditis. Of the stenosis, carcinoid most common condition. In contrast, pure regurgitation multiple. Two major categories conditions associated with anatomically abnormal valve cusps trauma, endocarditis) normal (elevated pulmonary artery systolic pressures, idiopathic dilated trunk, Marfan's syndrome).