Echogenic intracardiac focus

Armine
Hi everyone.
Last week I went for my anatomy screening at 18 wks. Today the doc called me & said everything is normal, but that the baby has an isolated finding of Echogenic cardiac focus (a white spot on his heart). She told me not to worry (good luck with that) and that since all my other genetic screenings came back normal and chances of Down syndrome 1/1600, I shouldn't worry and that is common. Has anyone had any experience with this that they can share to put my mind at ease?
Thanks