Table 1.

Assessment of Severe AS and VSAS by Doppler Echocardiography5, 6, 8, 9, 10

	Severe AS	VSAS
Peak aortic jet velocity	>4 m/s	>5 m/s
MPG	>40 mm Hg	≥60 mm Hg
Aortic valve area	<1 cm2	<0.6 cm2
Indexed aortic valve area	<0.6 cm2/m2	<0.4 cm2/m2 (<0.45 cm2/m)
Dimensionless index	<0.25	<0.20

AS indicates aortic stenosis; MPG, mean transaortic pressure gradient; VSAS, very severe aortic stenosis.