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

Table 3 Three-layer longitudinal strain evolution during pregnancy

	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^‡

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
*P < 0.05 vs. Controls; ^†P < 0.05 vs. Trimester 1; ^‡P < 0.05 vs. Trimester 3; ^§P < 0.05 vs. Postpartum

ISSN: 1476-7120