the Basilar Artery

Background and Purpose: Dissecting aneurysms arising from the vertebrobasilar complex are rare and difficult to manage. More of their natural history needs to be known before treatment can be optimized. Case Description: We report a postpartum dissecting aneurysm of the right vertebrobasilar artery in a 31-year-old woman that was confirmed by angiographic identification of a double lumen. The intracranial segment of the right vertebral artery was thrombosed proximal to the aneurysm. The patient, managed conservatively, recovered well and, when reexamined 2 months later, was found to be neurologically intact A repeat angiographic study at that time demonstrated that the aneurysm had resolved. Conclusions: Proximal occlusion may have protected the aneurysm from rupture and further dissection, thereby making surgery unnecessary. (Stroke 1992;23:114-116) Dissecting aneurysms arising from the verte-brobasilar complex are extremely rare, andlittle is known about their natural history.1-2 Few patients have been reported since the initial description by Scholefield in 1924.3"6 Patients pre-sent with headache, followed by nausea, vomiting