 This trial tests the feasibility of enrolling up to 60 extremely preterm infants in a randomized, double-blinded study of blood pressure management within 12 months. It will enroll 60 infants between 23 07 and 26 67 weeks gestational age born at 6 participating NICHD Neonatal Research Network sites. Eligible infants will receive a study infusion drug dopamine or a dextrose placebo and a study syringe drug hydrocortisone or a normal saline placebo. Infants will be randomized to receive one of the following drug pairs: 1 dopamine and hydrocortisone; 2 dopamine and a placebo normal saline solution; 3 a placebo dextrose and hydrocortisone; or 4 placebo dextrose and placebo normal saline. NOTE: dopamine is normally mixed with dextrose and hydrocortisone is mixed with saline solution before being administered, which is why two different placebos are being used in this trial. 