Factors influencing the hemodynamic response to balloon angioplasty in the treatment of outflow anomalies of internal jugular veins, JVS-VL 2017

"...Results
PTA resulted in an increased outflow through the IJVs in most patients. However, younger individuals with transverse endoluminal defects and higher pre-PTA flows are more likely to respond well to PTA compared with those who exhibit hypoplasia, stenosis, or longitudinal endoluminal defects...."

Study concludes the earlier patients receive CCSVI angioplasty the better. It also teased out which types of blood flow problems will respond best.

Factors influencing the hemodynamic response to balloon angioplasty in the treatment of outflow anomalies of internal jugular veins

http://www.jvsvenous.org/article/S2213-333X(17)30336-0/fulltext