EIF?!? 20 week scan

I am so sick and nervous :(

Have any of your ladies ever heard of this or experienced this ????

I went to my 20 week anatomy scan and they told me the baby had an EIF on his heart . They told me it was an isolated finding - meaning that was it - nothing else was found ..

She also said it was a soft marker for Down syndrome … but told me it really isn’t worth mentioning because it is not indicative of a baby having that …I am just so upset and sick over this .. did anyone else experience the same ???