Vertebrobasilar dolichoectasia
2017-10-13T12:54:00Z
robinp
Elongation, dilatation, and/or tortuosity of the vertebrobasilar segment. The definition of VBD includes: (i) diameter of basilar or vertebral artery over 4.5 mm; or (ii) deviation of any portion more than 10 mm from the shortest expected course; and (iii) length of basilar artery over 29.5 mm or length of intracranial vertebral artery over 23.5 mm.
The basilar artery arises from the confluence of the two vertebral arteries.
Abnormal vertebral artery morphology