Abstract
BackgroundIn premature infants, we investigated whether the duration of extra-uterine development influenced autonomic nervous system (ANS) maturation.MethodsWe performed a longitudinal cohort study of ANS maturation in preterm infants. Eligibility included birth gestational age (GA) <37 weeks, NICU admission, and expected survival. The cohort was divided into three birth GA groups: Group 1 (≤29 weeks), Group 2 (30–33 weeks), and Group 3 (≥34 weeks). ECG data were recorded weekly and analyzed for sympathetic and parasympathetic tone using heart rate variability (HRV). Quantile regression modeled the slope of ANS maturation among the groups by postnatal age to term equivalent age (TEA) (≥37weeks).Results100 infants, median (Q1-Q3) birth GA of 31.9 (28.7–33.9) weeks, were enrolled: Group 1 (n=35); Group 2 (n=40); and Group 3 (n=25). Earlier birth GA was associated with lower sympathetic and parasympathetic tone. However, the rate of autonomic maturation was similar, and at TEA there was no difference in HRV metrics across the three groups. The majority of infants (91%) did not experience significant neonatal morbidities.ConclusionPremature infants with low prematurity-related systemic morbidity have maturational trajectories of ANS development that are comparable across a wide range of ex-utero durations regardless of birth GA.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.