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Insights into Imaging

Table 4 Grades of aortic stenosis [27]

From: Utility of magnetic resonance imaging in the evaluation of left ventricular thickening

 

Peak velocity (m/s)

Mean gradient

Valve area

Indexed valve area

Velocity ratio

Mild

2.6-2.9

<20a (<30b) mm Hg

<1.5 cm2

0.85 cm2/m2

>0.5

Moderate

3.0-4.0

20-40a (30–50 b) mm Hg

1-1.5 cm2

0.60-0.85 cm2/m2

0.25-0.5

Severe

>4.0

>40a (50b) mm Hg

<1 cm2

<0.6 cm2/m2

<0.25

  1. a AHA/ACC guidelines
  2. b ESC guidelines
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