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Josef F Dax, Gernot R Mller-Putz, Klaus Pfurtscheller, Berndt Urlesberger, Wilhelm Mller, Gert Pfurtscheller

Semiautomatisches Verfahren für die Untersuchung des synchronen Verhaltens von EEG- und Herzraten-Mustern bei Frühgeborenen / Semi-automatic procedure for the investigation of synchronized EEG- and heart rate patterns in preterm neonates

Keywords: Electroencephalogram (EEG), heart rate (HR), heart rate variability (HRV), preterm neonates, Elektroenzephalogramm (EEG), Herzrate (HR), Herzratenvariabilitt (HRV), Frhgeborene

Recordings of the electroencephalogram (EEG) and of the heart rate variability (HRV) of preterm neonates can give important information on the actual state of the nervous system. Both signals, EEG and HRV, are affected by parameters such as gestational age, stage of maturation and behavioral state. This work describes a method for automatic detection of slow wave EEG-bursts and a tool to average changes in the EEG and the corresponding heart rate. The detection is based on the hjorth activity (HA), calculated from the EEG. HA spikes (HAS) are identified by the determination of the beginning and end of existing spikes. HAS maxima and the time between two consecutive HAS are the basis for the triggering of the bursts. EEG power and time synchronized HR changes are averaged with a time window length of 20 s. Resultant, HR increase and duration are determined. These parameters, obtained by the automatic detection, proved to be comparable to the results of an expert.

Biomedizinische Technik, Walter de Gruyter

Print ISSN: 0013-5585
Volume: 50, 02/2005
Pages: 19 - 24

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