VSD 1.6mm for a 23 week fetus from gestation

Dear Doctor, would like to know whether such size of VSD can be a problem for a 23 wk old
fetus. The size of the VSD is 1.6mm as measured by ultrasound by a obstetric specialist. We are
referred to conduct a pediatric echocardiogram for further checkup in this week. We feel worried
and would appreciate if can advise about size. Thanks!

[Marie M Gleason, M.D.]

A 1.6 mm VSD is small and not likely to be something troublesome to the baby after birth.  The pediatric cardiologist will look for any other congenital heart abnormalities on the fetal echo, and will want to see the baby sometime after birth.