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Table 3 Three-layer longitudinal strain evolution during pregnancy

From: Quantitative evaluation of longitudinal strain in layer-specific myocardium during normal pregnancy in China

  Controls Trimester 1 Trimester 2 Trimester 3 Postpartum
  (13.6 ± 2.2)wk (24.8 ± 4.4)wk (38.1 ± 2.6)wk (7.4 ± 2.4)mo
GLS-endo (%) 24.32 ± 4.11 24.10 ± 2.78 23.97 ± 2.98 21.40 ± 3.07* 24.02 ± 3.17
GLS-mid (%) 21.15 ± 2.90 20.98 ± 3.20 21.03 ± 3.21 18.34 ± 2.76* 21.18 ± 2.26
GLS-epi (%) 18.96 ± 2.84 19.01 ± 3.33 18.61 ± 2.83 16.09 ± 2.57* 19.12 ± 3.33
Avg.GLS (%) 20.34 ± 2.97 21.09 ± 3.15 21.21 ± 2.60 18.62 ± 2.81* 20.95 ± 3.06
  1. Data are given as mean ± SD in absolute values. GLS indicates the global longitudinal strain; GLS-endo, the average value of global longitudinal strain in the endocardial layer at the basal, mid-ventricular and apical levels; GLS-mid, the average value of global longitudinal strain in the mid-myocardial layer at the basal, mid-ventricular and apical levels; GLS-epi, the average value of global longitudinal strain in the epicardial layer at the basal, mid-ventricular and apical levels
  2. *P < 0.05 vs. Controls; P < 0.05 vs. Trimester 1; P < 0.05 vs. Trimester 3; §P < 0.05 vs. Postpartum