BPD is high and medical treatment of BPD may be consid- ered early in the course of the disease.

E3 and E4 stage, proposed by McNamara and Sehgal 5 and used in this study. In the scoring system that we developed, which included birth weight, gestational age, presence of respiratory distress syndrome, hypotension, sex, intraventricular hemorrhage, and HSPDA, the presence of HSPDA owed 3 points to the total score, in which a score between 7 and 9 predicted the development of BPD in 81.2% of cases. Thereforeitwasthe greatest contributing factor for thedevelopment of BPD. We believe that there is a strong association between a HSPDA and the development of BPD. Close hemodynamic monitoring is essential during the management of these infants. If there is a HSPDA, the risk of developing