CRITERIA	Description
1. Reflux IJV and\or VV in both positions Reflux in one position and absence of flow in the other	Yes, No Segments: IJVr, IJVl, VVr,VVl
3. High resolution B-mode evidence of proximal IJV stenoses and/or other B-mode anomalies	Yes, No: Segments IJVr, IJVl CSA < 0.3: Segments IJVr, IJVl Flow velocity > 90 cm/sec: Segments IJVr, IJVl Fixed M-mode Evaluation: Segments IJVr, IJVl
4. Absence of flow in IJV and\or VV in both positions	Yes, No Segments: IJVr, IJVl, VVr,VVl
5. CSA sitting > supine in the IJV	Left, Right
ADDITIONAL CRITERION: 2. Reflux in the intracranial veins	Yes, No
CONCLUSIONS	CCSVI YES, CCSVI NO N° of fulfilled criteria…./ Affected segments: IJVr, IJVl, suspected AZY