Acute morphological changes of impending rupture of vertebral artery dissection: clinical management of symptomatic but unruptured vertebral artery dissection. Illustrative case

The reported actual risk of rupture for vertebral artery dissection (VAD) in patients presenting with headache is very low, ranging from 0.4% to 1.0%. The authors report a case in which the dissection site dilated rapidly within several hours after the dissection occurred resulting in subarachnoid hemorrhage (SAH).