Table 2:

Per patient analysis of flow pattern, and the presence or absence of collaterals on the side of the dominant jugular vein (or bilateral, if codominant)

Overall (n = 108)Collaterals PresentNo Collaterals Present
No stenosis bilaterally35 (32.4%)
Mild or moderate stenosis of nondominant jugular vein24 (22.2%)
Moderate stenosis of dominant jugular vein31 (28.7%)11/31 (35.5%)20/31 (64.5%)
Severe stenosis of dominant jugular vein18 (16.7%)10/18 (55.6%)8/18 (44.4%)