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Updated: Oct 17, 2026
Fetal Echocardiography and Pulsed-wave Doppler Ultrasound in a Rabbit Model of Intrauterine Growth Restriction
Published on: June 29, 2013
Intrauterine growth retardation and fetal cardiac function
F M Severi1, G Rizzo, C Bocchi
1Department of Obstetrics and Gynecology, Emergency Section, University of Siena, Siena, Italy. severi@unisi.it
Insights
Intrauterine growth retardation (IUGR) affects 3-10% of pregnancies, increasing risks for fetal death and long-term neurological issues. Fetal cardiac function adapts to uteroplacental insufficiency, with Doppler indices aiding management.
Area of Science:
- Perinatology
- Fetal Medicine
- Cardiovascular Physiology
Background:
- Intrauterine growth retardation (IUGR) is a significant obstetric complication affecting 3-10% of pregnancies.
- IUGR is linked to increased fetal mortality (20-25%), perinatal mortality, and long-term neurological deficits.
- Existing research analyzes causes of IUGR and Doppler findings in normal fetuses, but hemodynamic adaptations in IUGR require further elucidation.
Purpose of the Study:
- To analyze the causes of IUGR.
- To discuss cardiac and venous Doppler findings in normal fetuses.
- To examine hemodynamic cardiac modifications and functional changes in fetuses with IUGR.
Main Methods:
- Review of existing literature on IUGR.
- Analysis of fetal cardiac and venous Doppler velocity indices.
- Discussion of hemodynamic redistribution in the fetal cardiovascular system.
Main Results:
- IUGR fetuses exhibit altered cardiac function, characterized by redistribution of cardiac output.
- A compensatory mechanism favors the left ventricle to address uteroplacental insufficiency.
- Doppler velocity indices change progressively with fetal deterioration, indicating altered hemodynamics.
Conclusions:
- Fetal cardiac function demonstrates adaptive redistribution in response to IUGR-induced uteroplacental insufficiency.
- Doppler velocimetry is a crucial tool for monitoring fetal well-being and managing pregnancies complicated by IUGR.
- Understanding these hemodynamic changes is vital for improving perinatal outcomes in IUGR cases.
Abstract:
Intrauterine growth retardation is a pathology which is found in 3-10% of all pregnancies and it is associated with around 20-25% of all fetal intrauterine deaths and with long-term neurologic sequelae. It presents an increased risk of distress during labor and delivery and a greater risk of perinatal mortality. The causes of IUGR and the cardiac and venous Doppler in normal fetuses are analyzed, and the hemodynamic cardiac modifications in IUGR fetus are discussed. The fetal cardiac function in intrauterine growth retardation shows a redistribution of the fetal cardiac output, which tends to favor the left ventricle as the mechanism to compensate for the uteroplacental insufficiency. The Doppler velocity indices are modified as the fetal condition progressively deteriorates and they represent an important tool for the management of the complicated pregnancy.
