DailyDx: Can You Identify These Fetal Cardiac Structures?

This is an ultrasound image and echocardiogram video of a normal 28 week old fetus.   Name the structures marked 1, 2 and 3.

(Click ultrasound image to full size)

Add your comments below, then check the answer.

The answers are:

1) Ductus Arteriosus
2) Ascending Aorta
3) Superior Vena Cava

We challenge you to stump your colleagues! Send us your unusual images.