[Vertebrobasilar insufficiency caused by extravasal compression of the vertebral artery in the second segment].

Objective: To develop indications for surgical treatment for positional disorders of blood flow in the vertebral-basilar territory caused by the damage to the V2-V3 segment of the vertebral artery (VA).

Material And Methods: One hundred and fourteen patients with systemic and non-systemic dizziness were studied. To assess the state of the VA, blood circulation of the posterior cranial fossa and the base of the brain, ultrasound duplex scanning of blood vessels, selective angiography, MRI, single photon emission computed tomography (SPECT) of the brain and neuropsychological testing were performed.

[Topographical and anatomical characteristics of the vertebral artery in the third segment].

Lesions of the vertebral arteries (VAs) are encountered in clinical practice comparatively often. They can be manifested by a wide range of signs and symptoms, including transitory ischaemic attacks in the vertebrobasilar basin, ischaemic strokes (IS), and chronic insufficiency of cerebral circulation with the transition into vascular encephalopathy. Surgical management of VA proximal stenoses requires that the surgeon be highly qualified, because it is associated with a high rate of both intra- and postoperative complications (amounting to 10-15%), including ischaemic strokes, thrombosis of the reconstruction zone, haemorrhage, lymphocele, as well as lesions of thephrenic, recurrent, and sympathetic nerves.

Surgical management of vertebrobasilar insufficiency due to pathology of the second-third segments of the vertebral artery.

Aim Of The Study: To determine efficacy of surgical management for vertebrobasilar insufficiency (VBI) associated with pathological passage of the vertebral artery (VA) within the bone canal.

Materials And Methods: Over the period from 2003 to 2008, a total of twenty-five patients with no effect of conservative therapy during 6 months were subjected to reconstruction of the VA in the 3rd segment. The access to the artery was obtained in a manner similar to that used in reconstruction of the carotid arteries, without intersecting the nodding muscle.