Table 3.18-3. Classification of aortic stenosis

Aortic stenosis

Mild

Moderate

Severe

AVA (cm2)

>1.5

1.0-1.5

<1.0 (0.6 cm2/m2 BSA)

Mean gradient (mm Hg)

<25

25-39

≥40

Jet velocity (m/s)

<3

3-3.9

≥4

Doppler velocity index or dimensionless index

>0.50

0.25-0.50

<0.25

Based on Circulation. 2014;129(23):e521-643.

AVA, aortic valve area; BSA, body surface area.