Septal to posterior wall motion delay[11] |
M-mode |
≥ 130 ms |
Septal flash[12] |
M-mode |
Nonquantifiable1 |
Apical rocking[12] |
2D apical 4 chambers |
Nonquantifiable2 |
Basal septal to lateral Ts delay[13] |
Tissue Doppler imaging |
≥ 60 ms |
Maximum delay in Ts in 4 basal LV segments[14] |
Tissue Doppler imaging |
> 65 ms |
SD of Ts of 6 basal LV segments[15] |
Tissue Doppler imaging |
≥ 34.4 ms |
Antero-septal to posterior time to peak strain difference (radial strain[16] |
2D speckle tracking |
≥ 130 ms |
SD of time to minimum systolic volume of 16 LV segments (systolic dyssynchrony index)[16] |
3D echocardiography |
> 5.6% |