Table 1 Indices of ventricular dyssynchrony obtained by tissue Doppler and strain imaging
From: Tissue Doppler and strain imaging: anything left in the echo-lab?
Method | Parameter | Cut-off |
|---|---|---|
TVI | Difference between peak systolic velocities of opposite walls [41] | > 65 ms |
PW- TDI | Sum of interventricular and intraventricular asynchrony [40] | > 167 ms |
TVI | Systolic time-to-peak velocity -SD [42] | > 32.6 ms |
TSI | Systolic time-to-peak velocity -SD [46] | > 34.4 ms |
Strain Doppler | Time-to-peak of negative strain (systolic or post-systolic) -SD [43] | > 60 ms |
Strain Doppler | Sum of times-to-peak of post-systolic shortening [44] | > 760 ms |
2D strain | Difference of time-to-peak of radial systolic strain [45] | = 130 ms |