| Peak velocity (m/s)**, **** |
|---|
| Normal*: <1.9 Possible stenosis***: 1.9-2.5 Suggests significant stenosis***: ≥2.5 |
| Mean gradient (mm Hg)**, **** |
| Normal*: ≤5 Possible stenosis***: 6-10 Suggests significant stenosis***: >10 |
| VTIPrMv/VTILVO**, **** |
| Normal*: <2.2 Possible stenosis***: 2.2-2.5 Suggests significant stenosis***: >2.5 |
| EOA (cm2) |
| Normal*: ≤2.0 Possible stenosis***: 1-2 Suggests significant stenosis***: <1 |
| PHT (ms) |
| Normal*: <130 Possible stenosis***: 130-200 Suggests significant stenosis***: >200 |
PHT, Pressure half-time; PrMV, prosthetic mitral valve.
*Best specificity for normality or abnormality is seen if the majority of the parameters listed are normal or abnormal, respectively.
**Slightly higher cutoff values than shown may be seen in some bioprosthetic valves.
***Values of the parameters should prompt a closer evaluation of valve function and/or other considerations such as increased flow, increased heart rate, or PPM.
****These parameters are also abnormal in the presence of significant prosthetic MR.