الفهرس 
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Abstract
The aim of this study is 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). We studied two groups; group A: 50 cases were normal control and group B: 50 cases were FGR. All cases had scanned at the ultrasound unit of EL-Shatby Maternity University Hospital, Alexandria University, Egypt. At a gestational age window: 28-37 weeks.
Doppler interrogation of 4 vessels had been underwent in all cases; namely: umbilical artery, middle cerebral artery, ductus venosus and aortic isthmus. Cerebroplacental ratio (CPR) then calculated by dividing the PI of MCA by the PI of UA. Aortic isthmus (AoI) had been sampled in the sagittal plane of the aortic arch by placing the sample gate few millimeters caudal to the origin of the left subclavian artery.
Doppler assessment for all cases had been done twice: 1st time at the initial diagnosis of FGR and the 2nd time was within the last 48 hours before delivery. All cases were assessed after delivery for Apgar score at 5 minutes and admission to the neonatal intensive care unit (NICU).
We found that CPR in group B in the 2nd visit is statistically significantly higher than in the 1st visit and also higher than CPR in group A in both visits. AoI-PI in group B at the 2nd visit is statistically significantly higher than in the 1st visit and also higher than AoI-PI in group A in both visits.