Franc Jager (Author), Ksenija Geršak (Author), Paula Vouk (Author), Žiga Pirnar (Author), Andreja Trojner-Bregar (Author), Miha Lučovnik (Author), Ana Borovac (Author)

Abstract

The aim of the present study was to assess the capability of conduction velocity amplitudes and directions of propagation of electrohysterogram (EHG) waves to better distinguish between preterm and term EHG surface records. Using short-time cross-correlation between pairs of bipolar EHG signals (upper and lower, left and right), the conduction velocities and their directions were estimated using preterm and term EHG records of the publicly available Term–Preterm EHG DataSet with Tocogram (TPEHGT DS) and for different frequency bands below and above 1.0 Hz, where contractions and the influence of the maternal heart rate on the uterus, respectively, are expected. No significant or preferred continuous direction of propagation was found in any of the non-contraction (dummy) or contraction intervals; however, on average, a significantly lower percentage of velocity vectors was found in the vertical direction, and significantly higher in the horizontal direction, for preterm dummy intervals above 1.0 Hz. The newly defined features—the percentages of velocities in the vertical and horizontal directions, in combination with the sample entropy of the EHG signal recorded in the vertical direction, obtained from dummy intervals above 1.0 Hz—showed the highest classification accuracy of 86.8% (AUC = 90.3%) in distinguishing between preterm and term EHG records of the TPEHGT DS.

Keywords

propagacija EHG valov;križna korelacija;prazni intervali;intervali s popadki;hitrost prevajanja;napovedovanje prezgodnjega poroda;propagation of EHG waves;cross correlation;dummy intervals;contraction intervals;conduction velocity;preterm birth prediction;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FRI - Faculty of Computer and Information Science
UDC: 004:616.831-073.7-71
COBISS: 49646595 Link will open in a new window
ISSN: 1424-8220
Views: 184
Downloads: 45
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Other data

Secondary language: Slovenian
Secondary keywords: propagacija EHG valov;križna korelacija;prazni intervali;intervali s popadki;hitrost prevajanja;napovedovanje prezgodnjega poroda;
Type (COBISS): Article
Pages: str. 1-30
Volume: ǂVol. ǂ20
Issue: ǂno. ǂ24
Chronology: Dec. 2020
DOI: 10.3390/s20247328
ID: 14344611