PSD modifications of FHRV due to CTG storage rate

M. Cesarelli*, M. Romano, M. Ruffo, P. Bifulco, G. Pasquariello, A. Fratini

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Cardiotocographic data provide physicians information about foetal development and, through assessment of specific parameters (like accelerations, uterine contractions, ...), permit to assess conditions such as foetal distress. An incorrect evaluation of foetal status can be of course very dangerous. In the last decades, to improve interpretation of cardiotocographic recordings, great interest has been dedicated to FHRV spectral analysis. It is worth reminding that FHR is intrinsically an uneven series and that to obtain evenly sampled series, many commercial cardiotocographs use a zero-order interpolation (storage rate of CTG data equal to 4 Hz). This is not suitable for frequency analyses because interpolation introduces alterations in the FHR power spectrum. In particular, this interpolation process can produce artifacts and an attenuation of the high-frequency components of the PSD that, for example, affects the estimation of the sympatho-vagal balance (SVB - computed as low-frequency/high-frequency ratio), which represents an important clinical parameter. In order to estimate the frequency spectrum alterations due to zero-order interpolation and other CTG storage rates, in this work, we simulated uneven FHR series with set characteristics, their evenly spaced versions (with different storage rates) and computed SVB values by PSD. For PSD estimation, we chose the Lomb method, as suggested by other authors in application to uneven HR series.

Original languageEnglish
Title of host publicationFinal Program and Abstract Book : 9th International Conference on Information Technology and Applications in Biomedicine, ITAB 2009
PublisherIEEE
Number of pages4
ISBN (Print)978-1-4244-5379-5
DOIs
Publication statusPublished - 2009
Event9th International Conference on Information Technology and Applications in Biomedicine - Larnaca, Cyprus
Duration: 4 Nov 20097 Nov 2009

Conference

Conference9th International Conference on Information Technology and Applications in Biomedicine
Abbreviated titleITAB 2009
CountryCyprus
CityLarnaca
Period4/11/097/11/09

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Keywords

  • FHRV
  • home cardiotocography
  • Lomb method
  • sympatho-vagal balance

Cite this

Cesarelli, M., Romano, M., Ruffo, M., Bifulco, P., Pasquariello, G., & Fratini, A. (2009). PSD modifications of FHRV due to CTG storage rate. In Final Program and Abstract Book : 9th International Conference on Information Technology and Applications in Biomedicine, ITAB 2009 IEEE. https://doi.org/10.1109/ITAB.2009.5394444