Figure 1. Severely preeclamptic patients receiving 103 spinal (open circles) or 35 epidural (closed circles) anesthetic procedures for cesarean section. Data are mean +/- SD. Lowest mean blood pressures recorded do not differ between groups. Before Block = 20 min before regional anesthesia induction; Up to Delivery = period from regional anesthesia induction to delivery; After Delivery = period from delivery to the end of surgery.