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Cardiac function in fetal growth restriction.

Ilenia Mappa1, Pavjola Maqina1, Victoria Bitsadze1,2

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Summary
This summary is machine-generated.

Fetal growth restriction (FGR) impacts fetal development and long-term health due to placental insufficiency. This review explores how early and late FGR uniquely alter fetal cardiac hemodynamics and blood flow.

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Area of Science:

  • Obstetrics and Gynecology
  • Fetal Medicine
  • Cardiology

Background:

  • Fetal growth restriction (FGR) is a condition where a fetus cannot reach its full growth potential.
  • FGR is classified as early (<32 weeks) or late (≥32 weeks) onset, each with distinct pathological mechanisms.
  • FGR is linked to adverse short- and long-term outcomes, including neurodevelopmental delay and increased risk of infant and adult complications.

Purpose of the Study:

  • To review the modifications in fetal cardiac hemodynamics in early and late-onset FGR.
  • To elucidate the distinct mechanisms of cardiac hemodynamic changes in early versus late FGR.
  • To highlight the impact of placental insufficiency and chronic fetal hypoxia on fetal cardiac function.

Main Methods:

  • This review synthesizes existing literature on fetal cardiac hemodynamics in FGR.
  • It analyzes studies focusing on cardiovascular adaptations and maladaptations in early and late FGR.
  • The review discusses findings from Doppler ultrasound and other fetal assessment techniques.

Main Results:

  • Early-onset FGR involves preferential cardiac output diversion to the brain and heart, with abnormal flow patterns indicating worsening hypoxia.
  • Late-onset FGR is characterized by fetal heart remodeling and functional changes, primarily due to reduced umbilical vein flow.
  • Both forms of FGR demonstrate significant alterations in fetal cardiac hemodynamic profiles.

Conclusions:

  • Fetal growth restriction significantly impacts fetal cardiac hemodynamics, with distinct patterns observed in early and late-onset cases.
  • Understanding these hemodynamic alterations is crucial for predicting outcomes and managing pregnancies complicated by FGR.
  • Further research into targeted interventions based on specific hemodynamic profiles is warranted.