Transthoracic echocardiography (TEE ... Stage B (progressive) mitral stenosis is typified by rheumatic changes in the mitral valve, including fusion of the commissures, as well as valve doming ...

Transthoracic echocardiography (TTE ... a lower threshold for surgery may be considered. Rheumatic mitral valve disease is less amenable to repair than degenerative mitral valve disease.