Key result
Severe acidaemia during the last 30 minutes of labour was associated with significantly increased normalised low-frequency power (P=0.01) and decreased high-frequency power (P=0.03) in fetuses.
Why the study?
Does spectral analysis of heart-rate variability detect changes in autonomic nervous system modulation in fetuses with severe acidaemia during labour?
Population
20 healthy human fetuses during labour at term, including 10 with umbilical artery pH < 7.05 and 10 with…
Comparison
Spectral analysis of fetal beat-to-beat heart… vs Fetuses without acidaemia (arterial pH > 7.20).
Design
Case-control
Follow-up
during labour
Authors
Loading...
Normalized fetal HRV metrics may aid autonomic assessment in labour; hypothesis-generating and requires prospective validation before clinical adoption.
Case-Control (n=20)
No
Does spectral analysis of heart-rate variability detect changes in autonomic nervous system modulation in fetuses with severe acidaemia during labour?
p-value: p=0.01
Normalised low and high frequency power of heart-rate variability can detect autonomic nervous system responses to severe stress and may discriminate between normal and abnormal fetal conditions during labour.
Laar et al. (2009) conducted a case-control in Severe acidaemia during labour (n=20). Severe acidaemia (umbilical artery pH < 7.05) vs. Non-acidaemic fetuses (arterial pH > 7.20) was evaluated on Absolute power and normalised power in the low-frequency and high-frequency bands of heart-rate variability (p=0.01). Severe acidaemia during the last 30 minutes of labour was associated with significantly increased normalised low-frequency power (P=0.01) and decreased high-frequency power (P=0.03) in fetuses.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: