A patent ductus arteriosus (PDA) is a persistent connection between the aorta and the pulmonary artery resulting in left to right shunting. This connection is supposed to close shortly after birth ...

After birth, the pulmonary arterioles dilate and the right heart pressures drop. The left heart pressures increase ... As a result, the DA is more likely to remain patent and the resulting shunt ...

The Goetz sign is typically seen during right ventriculography in the setting of a patent ductus arteriosus ... in the pulmonary artery from non-contrast enhanced blood shunting left to right ...

Cite this: Current Controversies in the Diagnosis and Treatment of Patent Ductus Arteriosus in Preterm Infants ... [1] Early shunts are "balanced," or right to left. Early shunting is ...