Fetal Autonomic Nervous sysTem Evaluation

Ten standard derivation electrodes were used to acquired FANTE registrations. The peripheral electrodes (Left (L), Right (R) and Foot (F)) were placed on the maternal abdomen in a triangle around the navel (orange) with lower apex, while the precordial ones (C1, C2, C3, C4, C5, C6) were put on an external circle. The Neutral electrode was on the right side of the patient abdomen. The software was configured so that the system acquired and wrote on disk 8 signals (2 bipolar and 6 referenced to the centroid of the three L, R and F leads) at 1000 sps with a resolution of 0.763uV. This high resolution is needed to resolve the very small voltage changes related to fetal cardiac activity.