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[Pathogenesis of deceleration in the prenatal period]
Insights
Fetal hemodynamic disorders, including intracardiac and fetoplacental circulation issues, are the primary cause of antenatal decelerations in fetuses. These circulatory problems worsen with increased resistance and fetal hypoxia.
Area of Science:
- Obstetrics and Gynecology
- Fetal Medicine
- Cardiovascular Physiology
Background:
- Antenatal decelerations pose risks to fetal well-being.
- Understanding the underlying pathophysiology is crucial for timely intervention.
Purpose of the Study:
- To investigate the role of fetal hemodynamic disorders in the development of antenatal decelerations.
- To elucidate the relationship between intracardiac and fetoplacental circulation and fetal hypoxia.
Main Methods:
- Utilized cardiotocography, dopplerometry, and doppler echocardiography.
- Examined 69 pregnant women experiencing antenatal decelerations.
Main Results:
- All cases exhibited disorders in both intracardiac fetal hemodynamics and fetoplacental circulation.
- Circulatory disorders were identified as the fundamental cause of decelerations.
- Decelerations correlated with progressive fetoplacental circulation deterioration and altered intracardiac hemodynamics.
Conclusions:
- Fetal circulatory disorders are central to the pathogenesis of antenatal decelerations.
- Progressive deterioration of fetoplacental circulation, coupled with increased vascular resistance and fetal hypoxia, drives deceleration development.
Abstract:
Comprehensive examination, making use of cardiotocography, dopplerometry, and doppler echocardiography, was carried out to disclose the contribution of fetal hemodynamic disorders to the pathogenesis of antenatal deceleration in 69 pregnant women. Disorders of both intracardiac fetal hemodynamics and of the fetoplacental circulation were revealed in all the cases with deceleration. Therefore, circulatory disorders underlie the pathogenesis of decelerations. The development of decelerations is related to the progressive deterioration of fetoplacental circulation and, specifically, to marked changes in the intracardiac hemodynamics in conditions of augmenting peripheral vascular resistance and hypoxia of the fetus.