Wynik wyszukiwania w bazie Polska Bibliografia Lekarska GBL

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Tytuł oryginału: Tłumienie elektrokardiogramu matczynego w pośredniej elektrokardiografii płodowej.
Tytuł angielski: Suppression of maternal ECG in abdominal fetal electrocardiography.
Autorzy: Matonia Adam, Gacek Adam, Jeżewski Janusz, Kupka Tomasz, Wróbel Janusz, Horoba Krzysztof
Źródło: Klin. Perinatol. Ginekol. 2002: 36 s.308-316, il., bibliogr. 9 poz., sum.
Sygnatura GBL: 313,663

Hasła klasyfikacyjne GBL:
  • ginekologia i położnictwo
  • kardiologia

    Wskaźnik treści:
  • ludzie
  • płód
  • płeć żeńska
  • ciąża


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    Tytuł oryginału: Monitoring of mechanical and electrical activity of fetal heart: determination of the FHR.
    Autorzy: Jeżewski Janusz, Horoba Krzysztof, Wróbel Janusz, Sikora Jerzy, Gacek Adam, Matonia Adam, Kupka Tomasz
    Źródło: Arch. Perinat. Med. 2002: 8 (1) s.33-39, il., bibliogr. 22 poz.
    Sygnatura GBL: 306,526

    Hasła klasyfikacyjne GBL:
  • radiologia

    Typ dokumentu:
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • ludzie
  • ciąża
  • płeć żeńska

    Streszczenie angielskie: Fetal heart rate (FHR) analysis is widely used as an assessment of fetal wellbeing. The recording of electrical activity of the fetal heart has obviously the potential to provide R-R intervals data with beat-to-beat accuracy. At present, the most common is the monitoring of mechanical activity of a fetal heart using the ultrasound Doppler method. Both in the abdominal electrocardiography (FECG) and in the Doppler ultrasound method, an estimation of the instantaneous fetal heart rate requires the advanced techniques of processing and analysis of the input signal. The Doppler signal has a complex structure, which is continuously changing due to continuous variations in the relative orientation of the ultrasound beam with respect to the fetal heart. Instead of relying only on the amplitude the autocorrelation and crosscorrelation techniques analyse the entire signals and therefore they are more accurate. However, the autocorrelation leads to decreasing the beat-to-beat variability and the crosscorrelation is more sensitive to periodic interferences. In case of the fetal indirect electrocardiography, the signal obtained contains three components: maternal electrocardiogram (MECG), fetal electrocardiogram and noise. The most important is suppression of the dominating MECG, which amplitude many times exceeds the level of the fetal electrocardiogram. Obtaining high quality FECG signal in any recordings can never be guaranteed. Despite all the above mentioned advances in signal processing, abrupt erroneous changes in fetal heart rate may occur.


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    Tytuł oryginału: Monitoring of mechanical and electrical activity of fetal heart: the nature of signals.
    Autorzy: Jeżewski Janusz, Wróbel Janusz, Horoba Krzysztof, Cholewa Dariusz, Gacek Adam, Kupka Tomasz, Matonia Adam
    Źródło: Arch. Perinat. Med. 2002: 8 (1) s.40-46, il., bibliogr. 16 poz.
    Sygnatura GBL: 306,526

    Typ dokumentu:
  • tytuł obcojęzyczny

    Wskaźnik treści:
  • ludzie
  • płeć żeńska
  • ciąża
  • płód

    Streszczenie angielskie: At present, the heart activity is the only vital function of a fetus that can be recorded effectively. The instantaneous fetal heart rate (FHR) espressed in beats per minute is a reciprocal function of time interval calculated as the distance in time between a two successive cardiac cycles. The FHR signal can be obtained from the mechanical or electrical activity of fetal heart. Two techniques of fetal electrocardiogram fecording can be distinguished: direct - from fetal skin and indirect - from maternal abdomen. The direct access to the fetus can be made only during labour when the fetal membranes have been ruptured. The best results are obtained when the electrode penetrates the fetal presenting part - usually head. In the abdominal electrocardiography, the signal is acquired from electrodes placed on the surface of maternal abdomen. There is one major noise source that requires complex signal processing. It is an interfering electrocardiogram of the mother, magnitude of which is about 200 mV, whereas the fetal electrocardiogram is only of about 10 mV. Applying the Doppler principle of ultrasound waves aimed at the fetal heart enables monitoring of the mechanical activity of the fetal heart. Determination of instantaneous FHR relies on the detection of heart beats gased on the analysis of ultrasound beam reflected from the moving valves or walls.

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