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To evaluate the neurodevelopmental outcome of preterm infants with a grade III or IV hemorrhage and to assess the effect of routine low-threshold therapy of post-hemorrhagic ventricular dilatation (PHVD) on neurodevelopmental outcome.

Of the 214 preterm infants (≤34 weeks gestational age), 94 (44%) had a grade III intraventricular hemorrhage (IVH), and 120 (56%) had a grade IV hemorrhage. We evaluated the natural evolution of IVH, the need for intervention for PHVD, and neurodevelopmental outcome at 24 months corrected age.

PHVD developed significantly more often in the surviving infants with a grade III hemorrhage (53/68, 78%) than in infants with a grade IV hemorrhage (40/76, 53%; P = .002). Intervention for PHVD was required significantly more often in the grade III group, than in the grade IV group (P < .001). In the grade III group, cerebral palsy developed …