Table 1

Longitudinal change of Doppler PDA flow pattern and days of age in both clinically significant and non-significant PDA groups

Day 12424652131
Day 21321851616
Day 318112917
Day 417910
Day 5253
Day 613
Day 712
  • Values are number of infants with various Doppler PDA patterns documented on each day of age. Some infants had additional echocardiographic examination the same day. All the closing and closed patterns documented in the S-PDA group were the results of treatment.

  • PDA: patent ductus arteriosus; S: significant PDA; NS: non-significant PDA; PH: pulmonary hypertension.