[Brain sparing autoregulation of fetal circulation in HELLP syndrome--demonstrated by Doppler ultrasound findings].

In a case report of severe placental insufficiency in the HELLP-Syndrome with diastolic reverse flow in aorta and umbilical artery, the changes of flow in the renal artery and middle cerebral artery were demonstrated. A preferential perfusion of fetal brain at the expense of fetal kidneys was shown during fetal hypoxia.