How do the right pulmonary veins appear under ICE?

• A. Owl eyes
• B. Donut shape
• C. Star pattern
• D. Squared edges

Answer: (A)

When viewing from intracardiac echocardiography, the right pulmonary veins show up in a short-axis slice of the left atrium as two small circular structures side by side. This bilateral circular appearance looks like owl eyes, with each circular rim representing the ostium of a right pulmonary vein. This pattern helps identify the right pulmonary venous ostia and orient your imaging during mapping and ablation around the veins.

The other descriptors don’t fit this anatomy: a single donut would imply one circular ring, which isn’t the typical appearance for the two distinct right pulmonary veins; star patterns or squared edges aren’t used to describe this standard cross-sectional view of the RPVs.