| Peak velocity (m/s)** |
|---|
| Normal |
| <3 |
| Possible stenosis |
| 3-4 |
| Suggests significant stenosis |
| >4 |
| Mean gradient (mm Hg)** |
| Normal |
| <20 |
| Possible stenosis |
| 20-35 |
| Suggests significant stenosis |
| >35 |
| DVI |
| Normal |
| ≥0.30 |
| Possible stenosis |
| 0.29-0.25 |
| Suggests significant stenosis |
| <0.25 |
| EOA (cm2) |
| Normal |
| >1.2 |
| Possible stenosis |
| 1.2-0.8 |
| Suggests significant stenosis |
| <0.8 |
| Contour of the jet velocity through the PrAV |
| Normal |
| Triangular, early peaking |
| Possible stenosis |
| Triangular to intermediate |
| Suggests significant stenosis |
| Rounded, symmetrical contour |
| AT (ms) |
| Normal |
| <80 |
| Possible stenosis |
| 80-100 |
| Suggests significant stenosis |
| >100 |
PrAV, Prosthetic aortic valve.
*In conditions of normal or near normal stroke volume (50-70 mL) through the aortic valve. **These parameters are more affected by flow, including concomitant AR.