Aortic stenosis classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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Classification of aortic stenosis

Acquired Aortic Stenosis

Adult acquired aortic stenosis has two major causes, namely calcific disease of a structurally normal trileaflet valve or Rheumatic valve disease. Calcific aortic disease has many of the same risk factors as atherosclerotic disease and is characterized by fat deposition, inflammation, and calcification. it is also frequently seen in patients with renal failure. In comparison, Rheumatic valve disease involves fusion of the commissures between the leaflets, with a small central orifice.

Congenital Left-Sided Outflow Obstruction

Congenital Left-Sided Outflow Obstruction can be due to a variety of conditions, all of which culminate in obstruction of the left ventricular outflow tract. These conditions include:

1. Malformation of the aortic valve such as a bicuspid aortic valve
2. Unicuspid valve
3. Hypoplasia of the annulus
4. Supravalvular stenosis
5. Subvalvular stenosis