fig58

Figure 58. Echocardiographic study in parasternal short-axis projections (similar to [Figure 57], but from a different premature infant) featuring a moderate patent ductus arteriosus (PDA) (arrow in A) with a shunt from the descending aorta (DAo) to the pulmonary artery (PA). Doppler flow velocity through the PDA by continuous wave Doppler sampling (B) indicates a higher PA pressure than in the baby illustrated in [Figure 57]. Aorta (Ao) and peak velocity (P) are marked. Reproduced from Ref.^[36].