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Abnormal ductus venosus waveforms

Abnormal waveforms in fetal ductus venosus flow assessment can occur in a number of situations which include

Abnormal waveforms include

  • reduction flow in ductus venosus A wave
  • absent flow in ductus venosus A wave
  • reversal of flow in ductus venosus A wave
  • abnormal indices
    • abnormal pulsatility index (PI)
    • abnormal S wave to A wave ratio (S : A)
    • abnormal peak velocity index

Growth restricted fetuses with abnormal ductus venous flow have worse perinatal outcome compared to those where flow abnormality is confined to the umbilical or middle cerebral artery 8.

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