Spectral analysis of fetal heart rhythm in relation to fetal regular mouthing.

Fetal heart rate variation during fetal regular mouthing in behavioural state 1F was investigated applying spectral analysis. Periods with and without fetal regular mouthing movements were compared. The power spectrum of the periods with regular mouthing movements showed a peak at the frequency of the clusters of mouthing movements which was absent in the power spectrum of the corresponding periods without movements. The oscillations in the fetal heart rate associated with this peak in the power spectrum were detectable both in the heart rate tracings obtained from the abdominal electrocardiogram and those recorded by means of wide range Doppler ultrasound.

[1]  J. M. Swartjes,et al.  Fetal heart rhythms during behavioural state 1F. , 1988, European journal of obstetrics, gynecology, and reproductive biology.

[2]  H. Prechtl,et al.  Are there behavioural states in the human fetus? , 1982, Early human development.

[3]  Quantification of the fetal heart rate variability by spectral analysis in growth-retarded fetuses. , 1988, Gynecologic and obstetric investigation.

[4]  J. M. Swartjes,et al.  Computer analysis of antepartum fetal heart rate: 2. Detection of accelerations and decelerations. , 1990, International journal of bio-medical computing.

[5]  G S Dawes,et al.  Diurnal and other cyclic variations in human fetal heart rate near term. , 1982, American journal of obstetrics and gynecology.

[6]  W K Vaughn,et al.  The indirectly obtained fetal heart rate: comparison of first- and second-generation electronic fetal monitors. , 1986, American journal of obstetrics and gynecology.

[7]  K J Dalton,et al.  Diurnal, respiratory, and other rhythms of fetal heart rate in lambs. , 1977, American journal of obstetrics and gynecology.

[8]  P. Johnson,et al.  A comparison of episodic heart‐rate patterns in the fetus and newborn , 1982, British journal of obstetrics and gynaecology.

[9]  K. J. Dalton,et al.  Ultradian rhythms in human fetal heart rate: a computerised time series analysis. , 1986, International journal of bio-medical computing.

[10]  J. Patrick,et al.  Influence of maternal heart rate and gross fetal body movements on the daily pattern of fetal heart rate near term. , 1982, American journal of obstetrics and gynecology.

[11]  H. Prechtl,et al.  The Neurological Examination of the Full-term Newborn Infant. A Manual for Clinical Use from the Department of Experimental Neurology University of Groningen , 1964 .

[12]  J. M. Swartjes,et al.  Fetal mouth movements during behavioural states 1F and 2F. , 1988, European journal of obstetrics, gynecology, and reproductive biology.

[13]  J. M. Swartjes,et al.  Computerized assessment of fetal behavioral states , 1988, Journal of perinatal medicine.

[14]  J. Parer,et al.  Validity of mathematical methods of quantitating fetal heart rate variability. , 1985, American journal of obstetrics and gynecology.

[15]  J. Patrick,et al.  Definition of sleep state in the newborn infant by heart rate analysis. , 1977, American journal of obstetrics and gynecology.

[16]  Norman Crolee Dalkey,et al.  An experimental study of group opinion , 1969 .