Heart Rate Variability in Neonatal Piglets and Hypoxia
Author Information
Author(s): Sica Anthony L, Zhao Ning
Primary Institution: Department of Physiology and Pharmacology, SUNY Downstate Medical Center, Brooklyn, New York, USA
Hypothesis
Exposure to intermittent hypoxia would increase sympathetic efferent neuronal modulation of heart rate variability spectra in neurally intact animals and in those with right stellate ganglionectomy.
Conclusion
Both neurally intact animals and those with right stellate ganglionectomy had equivalent increases of activity in the low frequency region of heart rate variability spectra during hypoxic stimulation.
Supporting Evidence
- Heart rate variability spectra during baseline conditions were dominated by high frequency activity.
- Exposure to intermittent hypoxia did not alter daily baseline spectral features.
- Significant increases in low frequency activity were noted during hypoxic episodes.
Takeaway
The study looked at how heart rates change in baby pigs when they experience low oxygen levels, finding that their hearts respond similarly whether they have certain nerves cut or not.
Methodology
The study involved monitoring heart rate variability in neonatal piglets exposed to intermittent hypoxia and comparing it with control groups.
Limitations
The study did not fully evaluate the sources of respiratory sinus arrhythmia by application of ganglionic blockade.
Participant Demographics
Neonatal swine aged 7-16 days and weighing 2.2-5.0 kg.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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