Narrow aortic arch in newborn
We had a routine ultrasound on our newborn (13 days old) after a heart murmur was detected. The murmur is gone now but the ultrasound showed a narrow aortic arch (3.9 mm) with high blood flow (2.0 m/s). They said it's small on the isthmus but it's a normal shape and doesn't show signs of coarctation
They also said she has a small "fenestrated PFO". I understand that this is something which can take no this after birth to close so it isn't necessarily a concern.
The doctors want us to come back in a month to recheck but how concerned should I be? They said it's probably nothing, but also want us to come back so I am a bit conflicted.