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Fig. 1: Dolichoectasia of the suprasellar segment of the left internal carotid artery with compression of the optic chiasm. Most commonly affected are the vertebral and basilar arteries (Vertebral Basilar Dolichoectasia or Vertebrobasillar Dolichoectasia). The internal carotid artery may also be affected.
Vertebral artery dissection is one of the two types of cervical artery dissection.The other type, carotid artery dissection, involves the carotid arteries.Vertebral artery dissection is further classified as being either traumatic (caused by mechanical trauma to the neck) or spontaneous, and it may also be classified by the part of the artery involved: extracranial (the part outside the skull ...
Segments of vertebral artery anterior projection. The vertebral artery may be divided into four parts: The first (preforaminal) part runs upward and backward between the anterior scalene and the longus colli muscles. In front of it are the internal jugular and vertebral veins, and is crossed by the inferior thyroid artery; the left vertebral is ...
The diagnosis of Arterial Tortuosity Syndrome is established in a person with (1) generalized arterial tortuosity and (2) positive molecular genetic testing that identifies a pathogenic mutation in the SLC2A10 gene. [9]
Lateral medullary syndrome is a neurological disorder causing a range of symptoms due to ischemia in the lateral part of the medulla oblongata in the brainstem.The ischemia is a result of a blockage most commonly in the vertebral artery or the posterior inferior cerebellar artery. [1]
The proximal part of left subclavian is blocked (shaded artery). This prevents antegrade ("forward") flow to the left arm and left vertebral. As a result, flow in the left vertebral is retrograde ("backwards") towards the left arm. Flow to the brain and circle of Willis is via antegrade right and left carotid and right vertebral arteries. Specialty
Vertebrobasilar insufficiency (VBI) describes a temporary set of symptoms due to decreased blood flow in the posterior circulation of the brain.The posterior circulation supplies the medulla, pons, midbrain, cerebellum and (in 70-80% of people) supplies the posterior cerebellar artery to the thalamus and occipital cortex. [1]
Left sided cerebellar stroke due to occlusion of a vertebral artery. Cerebellar strokes account for only 2-3% of the 600,000 strokes that occur each year in the United States. [3] They are far less common than strokes which occur in the cerebral hemispheres.
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