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Table 2 Peak systolic radial normal strain, time to peak systolic radial normal strain and shear strain of LVPW, IVS in parasternal long axis views (mean ± SD)

From: Normal and shear strains of the left ventricle in healthy human subjects measured by two-dimensional speckle tracking echocardiography

Variance Wall Base Mid Apex
Normal peak systolic radial strain IVS 0.33 ± 0.13 0.35 ± 0.15 0.31 ± 0.16
LVPW 0.49 ± 0.16 0.50 ± 0.16 0.43 ± 0.16
P <0.00001 <0.001 <0.001
Time to peak systolic radial strain (ms) IVS 342 ± 34 333 ± 25 342 ± 24
LVPW 413 ± 36*** && 384 ± 38 384 ± 45
P <0.00001 <0.00001 <0.00001
Shear strain (degree) IVS −6.8 ± 7.9 2.0 ± 6.7 6.0 ± 7.6
LVPW 7.5 ± 11.9 8.6 ± 10.6 11.6 ± 9.6
P <0.00001 <0.05 <0.05
  1. ***Compared to the apex of the same wall, P < 0.001; &&Compared to the mid of the same wall, P < 0.01. LVPW, Left ventricular posterior wall; IVS, Interventricular septum; LV, Left ventricle.