Doppler fetal monitoring and non-invasive fetal ECG in modern obstetrics (review)
Background: Cardiotocography (electronic fetal monitoring) is a procedure of recoding fetal heart rate activity and uterine contractions during pregnancy and labor. The Doppler technique of cardiotocography using ultrasound transducers is widely used in obstetrics. However, in recent years there have been published articles on the subject of fetal electrocardiography (fECG) using abdominal electrodes during pregnancy and labor. Ultrasound fetal monitoring and non-invasive fetal ECG in obstetrics are two ways to obtain fetal heart rate (tachogram) recordings to diagnose fetal hypoxia or distress. Non-invasive fetal ECG in obstetric practice is not used to diagnose myocardial pathology, fetal cardiac conduction abnormalities both in pediatric and adult patients. The aim of the study: To evaluate the role of electronic Doppler fetal monitoring and non-invasive fetal ECG in the diagnosis of fetal hypoxia or distress. Materials and methods: A literature review of the role of fetal Doppler monitoring and non-invasive fetal ECG in the diagnosis of fetal hypoxia or distress in pregnancy and labor was performed using literature sources from the Pubmed, Elibrary, and Scopus databases for the past 15 years. Results: Analysis of the literature data has shown the widespread use of ultrasound fetal monitoring for testing for fetal hypoxia or distress compared with non-invasive fetal ECG at present. Most publications on non-invasive fetal ECG have described signal quality, with only a few literature sources devoted to the diagnosis of fetal hypoxia. Conclusion: Cardiotocography is the clinical method of choice for testing for fetal hypoxia or distress during pregnancy and labor. In contrast, non-invasive fetal electrocardiography is an alternative to Doppler ultrasound cardiotocography for assessment of fetal well-being. However, non-invasive fetal ECG has a lack of reliability for assessment of fetal well-being compared to Doppler ultrasound cardiotocography.
Shamarin SV, Enkova ЕV, Ippolitova LI, et al. Doppler fetal monitoring and noninvasive fetal ECG in modern obstetrics (review). Research Results in Biomedicine. 2023;9(2): 234-253. Russian. DOI: 10.18413/2658-6533-2023-9-2-0-7
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