Abstract
In a chronically instrumented fetal lamb the effect on heart rate variability of noradrenaline as well as hypoxemia is studied by the use of power spectral analysis. Subsequent to both noradrenaline infusion and hypoxemia the very low frequency components of the variability are markedly decreased as compared with control conditions. After hypoxemia also a high frequency peak appears in the spectrum.
MeSH terms
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Acute Disease
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Algorithms
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Animals
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Blood Pressure / drug effects
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Blood Pressure / physiology
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Bradycardia / physiopathology
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Data Interpretation, Statistical
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Electrocardiography / drug effects
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Female
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Fetus
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Heart Rate / physiology
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Heart Rate, Fetal / drug effects*
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Heart Rate, Fetal / physiology*
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Hypoxia / physiopathology*
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Infusions, Intravenous
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Norepinephrine / administration & dosage
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Norepinephrine / pharmacology*
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Pregnancy
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Sheep
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Signal Processing, Computer-Assisted