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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.
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Cardiovascular Ultrasound

ISSN: 1476-7120

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