. Author manuscript; available in PMC: 2018 Jul 1.

Published in final edited form as: J Am Soc Echocardiogr. 2017 Apr 19;30(7):685–698.e1. doi: 10.1016/j.echo.2017.03.003

Table 3.

Deformation measurements over the first week of age.

	Day 1	Day 2	Day 5 – 7	p
Entire cohort
Number of infants	132	132	98
LV GLS (%)	−18.4 ± 3.8	−20.5 ± 3.1^*	−21.8 ± 3.3^* ^†	<0.001
LV GLSRs (1/s)	−1.8 ± 0.4	−2.1 ± 0.4^*	−2.4 ± 0.4^* ^†	<0.001
IVS GLS (%)	−17.7 ± 2.1	−17.9 ± 2.1	−18.4 ± 2.1^*^†	<0.001
IVS GLSR (1/s)	−1.7 ± 0.2	−1.8 ± 0.2	−1.9 ± 0.2^†	0.16
RV FWLS (%)	−18.8 ± 4.7	−20.1 ± 5.1	−21.1 ± 4.7	0.05
RV FWLSRs (1/s)	−2.0 ± 0.6	−2.3 ± 0.7^*	−2.8 ± 0.6^* ^†	<0.001
Healthy uncomplicated cohort
Number of infants	65	65	36
LV GLS (%)	−18.4 ± 3.5	−20.3 ± 3.2^*	−20.7 ± 3.0 ^†	<0.001
LV GLSRs (1/s)	−1.8 ± 0.3	−2.1 ± 0.3^*	−2.3 ± 0.4 ^†	<0.001
IVS GLS (%)	−17.7 ± 2.1	−18.0 ± 2.1	−18.4 ± 2.1^*^†	<0.001
IVS GLSR (1/s)	−1.7 ± 0.2	−1.8 ± 0.2	−1.9± 0.2^†	0.12
RV FWLS (%)	−18.1 ± 4.0	−20.3 ± 3.2	−20.5 ± 3.2^*	0.02
RV FWLSRs (1/s)	−1.9 ± 0.5	−2.2 ± 0.6	−2.7 ± 0.7^†	0.004

Values are presented as mean (standard deviation). One way ANOVA with repeated measures was used to assess the change in values over time.

= p < 0.05 compared with previous day measurement;

^†

= p < 0.05 compared with Day 1 measurement (with Bonferroni adjustment).

RV, right ventricle; LV, left ventricle; IVS, interventricular septum

FWLS, free wall longitudinal strain; FWLSRs, free wall longitudinal systolic strain rate

GLS, global longitudinal strain; GLSRs, global systolic longitudinal strain rate