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Table 5 Univariate relations (r coefficient and significance) of three-dimensional-derived strain components in the pooled population

From: Structural and functional changes in maternal left ventricle during pregnancy: a three-dimensional speckle-tracking echocardiography study

Variable

GLS( P -value)

GCS( P -value)

GAS( P -value)

GRS( P -value)

Gestation period(w)

−0.286(<0.01)

−0.268(<0.01)

−0.299(<0.01)

−0.296(<0.01)

LVmi(g/m2)

0.176(>0.05)

0.133(>0.05)

0.220(<0.05)

0.170(>0.05)

Sphericity index

0.264(<0.01)

0.191(>0.05)

0.328(<0.01)

0.316(<0.01)

LA index(ml/m2)

0.253(<0.01)

0.171(>0.05)

0.258(<0.01)

0.269(<0.01)

3D EF(%)

0.436(<0.01)

0.472(<0.01)

0.549(<0.01)

0.541(<0.01)

  1. Abbreviations as in Tables 2, 3, and 4. Values of GLS, GCS, GRS and GAS considered as ‘positive’ (sign +) to build the univariate relations in order to homogenize the results of analyses and strengthen their clinical meaning: the higher the values, the better is the strain deformation independent of the plus/minus sign.