Blar i forfatter "Stefopoulou, Maria"

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    • Fetal Superior Vena Cava Blood Flow and Its Fraction of Cardiac Output: A Longitudinal Ultrasound Study in the Second Half of Pregnancy 

      Stefopoulou, Maria; Johnson, Jonas; Herling, Lotta; Lindgren, Peter; Kiserud, Torvid; Acharya, Ganesh (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-06)
      <i>Introduction</i>: In the fetus, a large proportion of the superior vena cava blood flow (QSVC) comes from the brain. To provide the possibility of using this blood flow as a representation of fetal brain circulation, we aimed to determine the fetal QSVC and its fraction of cardiac output during the second half of physiological pregnancies.<br><br> <i>Materials and Methods</i>: This was a ...

    • Reference ranges of fetal superior vena cava blood flow velocities and pulsatility index in the second half of pregnancy: a longitudinal study 

      Stefopoulou, Maria; Herling, Lotta; Johnson, Jonas; Lindgren, Peter; Kiserud, Torvid; Acharya, Ganesh (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-23)
      Background - Fetal superior vena cava (SVC) is essentially the single vessel returning blood from the upper body to the heart. With approximately 80-85% of SVC blood flow representing cerebral venous return, its interrogation may provide clinically relevant information about fetal brain circulation. However, normal reference values for fetal SVC Doppler velocities and pulsatility index are lacking. ...

    • Volume blood flow-based indices of fetal brain sparing in the second half of pregnancy: A longitudinal study 

      Stefopoulou, Maria; Johnson, Jonas; Wilsgaard, Tom; Lindgren, Peter; Herling, Lotta; Kiserud, Torvid; Acharya, Ganesh (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-07-07)
      <i>Introduction</i> - Cerebroplacental ratio (CPR) and umbilicocerebral ratio (UCR) are clinically used as a measure of fetal brain sparing. These are calculated as the ratios between the pulsatility indices (PIs) of middle cerebral (MCA) and umbilical (UA) arteries, and are an indirect representation of the balance between cerebral and placental perfusion. Volume blood flow (Q)‐based ratios, ie ...