FGR is one of the leading causes of intrauterine fetal demise (IUFD), emergency cesarean section (ECS), and perinatal death. The main cause of FGR is placental insufficiency that provokes fetal circulatory hemodynamic adaptation.
Assessment of the umbilical artery (UA) and middle cerebral artery (MCA) Doppler is the well established clinical practice in monitoring of fetuses with FGR. Cerebroplacental ratio (CPR) is MCAPI / UAPI and it has been noted that the CPR is decreased with decompensation of FGR.
Fetal aortic isthmus (AoI) Doppler has recently been suggested as a useful prognostic marker in monitoring of FGR fetuses as AoI velocity indices are lower and resistance indice sare higher in them than normal fetuses.
Anatomically, the aortic isthmus is located between the origin of the left subclavian artery from the arch of the aorta and the connection of the ductus arteriosus in the descending aorta.
AIM:
The aim of this study was to evaluate the relation between the aortic isthmus (AoI) Doppler velocimetry and cerebroplacental ratio (CPR) on the perinatal outcome in cases with fetal growth restriction (FGR).