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Spectral analysis of fetal heart rate in sheep: the occurrence of respiratory sinus arrhythmia.

Abstract：

:Respiratory sinus arrhythmia is a pattern of rhythmic variation in the heart rate that occurs at the frequency of respiration and is mediated principally by the vagus nerve. Spectral analysis can decompose the variance of a series of sequential measures into constituent frequencies to measure and verify whether there is respiratory sinus arrhythmia in utero in the fetal lamb. Recordings of heart period were obtained from electrodes implanted under fetal skin in six chronic preparations. Respiratory rate and heart period were recorded immediately after delivery and daily for the next 5 days. Respiratory sinus arrhythmia was clearly demonstrated in the neonatal lambs, and the same frequency of respiratory sinus arrhythmia was observed in the fetus and in the newborn lamb (0.8 to 0.1 Hz). There was a reproducible pattern of change in respiratory sinus arrhythmia from 27 days before delivery until term, with a decline in the amplitude of respiratory sinus arrhythmia 4 to 8 days before delivery. We conclude that respiratory sinus arrhythmia was demonstrated in fetal sheep and may serve as an indicator of the integrity of the central nervous system in the fetus and the neonate.

journal_name

Am J Obstet Gynecol

journal_title

American journal of obstetrics and gynecology

authors

Donchin Y,Caton D,Porges SW

doi

10.1016/0002-9378(84)90641-0

subject

Has Abstract

pub_date

1984-04-15 00:00:00

pages

1130-5

issue

8

eissn

0002-9378

issn

1097-6868

pii

0002-9378(84)90641-0

journal_volume

148

pub_type

杂志文章

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