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OBJECTIVE Fetal heart rate (FHR) variability is an important indicator of fetal well-being. In fetal tachyarrhythmias, however, visual analysis of FHR variability is limited. We therefore applied power spectral analysis of FHR to evaluate the fetal state. METHODS Fetal R-R intervals were detected by means of an external ECG in 3 fetuses with supraventricular extrasystoles after cardiac malformations had been excluded by fetal echocardiography. Using an autoregressive model, power spectral densities were calculated from 20 consecutive 256-beat segments for the following frequency bands: <0.03 Hz (very low frequency), 0.03-0.069 Hz (low frequency; LF), 0.07-0.129 Hz (mid-frequency) and 0.13-1.0 Hz (high frequency; HF). RESULTS The FHR variability in fetal supraventricular extrasystoles mainly resulted from the HF component (63.91 +/- 6.97%). The sympatho-vagal balance (LF/HF) was decreased in the tracings with extrasystoles (0.13). CONCLUSIONS The analysis of FHR variability in fetal supraventricular extrasystoles revealed an imbalance between sympathetic and parasympathetic regulation.
Carolyn Troeger, and
Andreas F Schaub, and
Paolo Bernasconi, and
Irene Hösli, and
Wolfgang Holzgreve
April 2000,
Ginekologia polska,
Carolyn Troeger, and
Andreas F Schaub, and
Paolo Bernasconi, and
Irene Hösli, and
Wolfgang Holzgreve
January 1988,
Gynecologic and obstetric investigation,
Carolyn Troeger, and
Andreas F Schaub, and
Paolo Bernasconi, and
Irene Hösli, and
Wolfgang Holzgreve
January 2014,
Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference,
Carolyn Troeger, and
Andreas F Schaub, and
Paolo Bernasconi, and
Irene Hösli, and
Wolfgang Holzgreve
October 2006,
Biomedizinische Technik. Biomedical engineering,
Carolyn Troeger, and
Andreas F Schaub, and
Paolo Bernasconi, and
Irene Hösli, and
Wolfgang Holzgreve
November 1993,
Early human development,
Carolyn Troeger, and
Andreas F Schaub, and
Paolo Bernasconi, and
Irene Hösli, and
Wolfgang Holzgreve
January 2014,
Early human development,
Carolyn Troeger, and
Andreas F Schaub, and
Paolo Bernasconi, and
Irene Hösli, and
Wolfgang Holzgreve
January 1997,
Biomedizinische Technik. Biomedical engineering,
Carolyn Troeger, and
Andreas F Schaub, and
Paolo Bernasconi, and
Irene Hösli, and
Wolfgang Holzgreve
August 2004,
Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi,
Carolyn Troeger, and
Andreas F Schaub, and
Paolo Bernasconi, and
Irene Hösli, and
Wolfgang Holzgreve
August 2004,
Artificial organs,
Carolyn Troeger, and
Andreas F Schaub, and
Paolo Bernasconi, and
Irene Hösli, and
Wolfgang Holzgreve
January 2008,
Acta obstetricia et gynecologica Scandinavica,
