Overview of Aortic Stenosis Aortic stenosis is the most common cause of LV outflow obstruction (less common causes include HOCM, subvalvular stenosis, or, rarely, supravalvular stenosis). Etiology AS can be divided into congenital (bicuspid), rheumatic, or degenerative (calcific). If in concert with rheumatic fever, is almost always associated with mitral pathology. These patients have an […]