At what size is a saccular outpouching of the interatrial septum considered significant?
Sources vary on the threshold of calling atrial redundancy "aneurysmal," with a range of 11-15 mm.
There is a saccular outpouching of the interatrial septum from the left atrium into the right atrium. It measures 11 mm off the midline, with a 13 mm base.
- CT (C+ arterial phase):