 Neuraxial anesthesia can induce a sympathetic blockade, which results in decreased maternal systemic vascular resistance and venous return. These alterations in the maternal hemodynamic profile impact maternal blood pressure, uteroplacental blood flow and fetal perfusion, and may contribute to maternal hypotension and changes in the FHR after initiation of regional anesthesia. Importantly, these hemodynamic changes generally occur in the setting of a constant maternal intravascular volume. Given that the uteroplacental circulation has limited capacity for autoregulation, uterine perfusion is sensitive to changes in both maternal blood pressure and venous return 10. This physiology represents the basis for the administration of an intravenous IV bolus prior to or during the placement of regional anesthesia 11. 