Persistent ductus arteriosus
PDA is common and seen in 1–2/1000 live births. Sometimes it follows on from a preterm delivery. It is defi ned as a duct still being present 1mth after the date that the child should have been born.
PDA results in a low diastolic pressure, due to blood flowing back into the pulmonary artery. There may be heart failure (breathlessness).
· A wide pulse pressure or bounding peripheral pulses.
· A continuous or machinery murmur in the left infraclavicular area.
The majority of defects will close spontaneously.
· Medical: diuretics.
· Cardiac catheter: device closure usually at 1yr.
· Surgical: ligation (rarely).