A longitudinal description of heart rate variability in 28--34-week-old preterm infants.

Abstract:

:The purpose of this study was to longitudinally describe changes in heart rate variability (HRV) from 28 to 34 weeks postmenstrual age (PMA). A convenience sample of 31 low-risk preterm infants participated. HRV was quantified using a spectral analysis of heart periods and recorded during seven weekly test sessions from an electrocardiogram (ECG) signal. The total range of frequency components (0.04-2.0 Hz), high-frequency (HF) components (0.30-1.3 Hz), and ratio of low-to-high frequency (LF/HF) components (0.04-0.20/ 0.30-1.3 Hz) were measured. A mixed general linear model analysis revealed no significant change over weekly test sessions for the total, the high, and the ratio of LF/HF components. A significant interaction effect was, however, noted in the HF components for test session x gender (df = 1; F = 4.85; p = .030). With increasing age, the HF components for females increased or displayed a pattern of HRV indicative of a more mature autonomic nervous system (ANS). Study findings warrant further investigation of the impact of gender on normative descriptions of HRV.

journal_name

Biol Res Nurs

authors

Krueger C,van Oostrom JH,Shuster J

doi

10.1177/1099800409341175

subject

Has Abstract

pub_date

2010-01-01 00:00:00

pages

261-8

issue

3

eissn

1099-8004

issn

1552-4175

pii

1099800409341175

journal_volume

11

pub_type

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