Table 1

Color Doppler ultrasound criteria of FMD

1. Morphological criteria:
     Segmental string-of-beads pattern with alternating regions of lumen narrowing and vessel dilatation
2. Localization:
     Distal extracranial part of ICA (VA).
3. Hemodynamics (optional):
     Direct and/or indirect criteria of stenosis (in distal extracranial part of ICA / VA).

Arning and Grzyska Cardiovascular Ultrasound 2004 2:7   doi:10.1186/1476-7120-2-7