Worried! Anatomy scan- EIF on heart

Chrissy

I just received my results from my anatomy scan at 20 weeks. The scan is showing an EIF (bright spot on the heart- calcium build up.) (I am now 21w4d.) I had genetic testing done around 12 weeks and everything came back normal and negative for the main chromosomal abnormalities. My nuchal ultrasound was also normal. Should I be concerned? Do you think I should have amniocentesis to be sure? I am going to be a first time mom so I am very worried!