Table 1

Classification of neonatal echocardiographic recordings by Doppler flow velocity waveform pattern and postnatal age at examination

Doppler velocity waveform pattern
PH (type 1)Growing (type 2)Pulsatile (type 3)Closing (type 4)Not classifiableTotal
Total3428555228197
Day of life
11812912960
210101018957
33354419
40165113
5010113
6102104
7002013
8–142199122
≥1500122216
  • PH, pulmonary hypertension.