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Table 3 Peak systolic radial normal strain, time to peak systolic radial normal strain and shear strain of LVPW, IVS in parasternal short 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 0.37 ± 0.11* 0.32 ± 0.15** 0.25 ± 0.11
LVPW 0.59 ± 0.18 0.51 ± 0.16 0.35 ± 0.14***
P <0.00001 <0.00001 <0.01
Time to peak systolic radial strain (ms) IVS 341 ± 35* 343 ± 23* 361 ± 35
LVPW 413 ± 43* & 384 ± 37 385 ± 47
P <0.00001 <0.00001 <0.01
Shear strain (degree) IVS −2.1 ± 9.1 0.0 ± 6.2 2.5 ± 8.6
LVPW −1.0 ± 9.4 −0.1 ± 9.0 1.3 ± 8.8
P ns ns ns
  1. Notes: *Compared to the apex of the same wall, P < 0.05; **Compared to the apex of the same wall, P < 0.01; ***Compared to the apex of the same wall, P < 0.0001; &Compared to the mid of the same wall, P < 0.01. LVPW, Left ventricular posterior wall; IVS, Interventricular septum; LV, Left ventricle.
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Cardiovascular Ultrasound

ISSN: 1476-7120

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