Diurnal rhythms in fetal heart rate baseline and sustained fetal tachycardia in twin pregnancy

Early Human Development
Yuri MaedaTsuyoshi Iwasaka

Abstract

To elucidate the synchronization of phases of diurnal rhythms in fetal heart rate (FHR) baseline between twin fetuses and the occurrence of sustained fetal tachycardia. FHR was simultaneously recorded in twins for 24 h in 7 monochorionic diamniotic (MD) and 8 dichorionic diamniotic (DD) twin pregnancies at 35 to 38 weeks of gestation. The diurnal rhythms of the hourly mean FHR baseline were tested in each fetus, and the time of occurrence of sustained fetal tachycardia was compared between twins. The correlation coefficients and phase lags of diurnal rhythms between the hourly mean FHR baselines of twins were calculated in each case. There were significant diurnal rhythms in the hourly mean FHR baselines of all twin fetuses (p<0.01). The patterns of diurnal rhythms were similar for each pair of twins, with the exception of the periods of sustained fetal tachycardia. Sustained fetal tachycardia was not coincident between twins. Analysis in which the periods of sustained fetal tachycardia were excluded demonstrated a significant correlation between the hourly mean FHR baselines of twins in all cases (p<0.01). In the case of DD twins, the phase lag between twins was 0; however, phase lags were observed in 4 cases of MD twins. The ...Continue Reading

References

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Jun 6, 2002·Psychiatry and Clinical Neurosciences·Masami MuroTsuyoshi Iwasaka

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Citations

Jan 15, 2013·Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies·Iva TendaisEduard J H Mulder
Oct 30, 2007·Birth Defects Research. Part C, Embryo Today : Reviews·Maria Seron-FerreClaudia Torres-Farfan
Mar 31, 2015·Obstetrics and Gynecology International·F J ValenzuelaC Lagunas

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