In the absence of proximal atherosclerotic disease, unilateral vertebral artery stenosis or occlusion is well tolerated.

Blood may reach the basilar artery via one vertebral artery and flow in a reverse direction down the opposite vertebral artery to supply the subclavian artery distal to the area of occlusion.

With total occlusion of 1 subclavian artery and partial obstruction of the contralateral vessel, the pressure gradient favors retrograde vertebral flow on the totally occluded side.

Figure 2. Magnetic resonance angiography of the neck showing right vertebral artery tapering occlusion (arrow), caused by vertebral artery dissection in the distal V2 segment.

If vertebral artery (VA) occlusion was detected, then CT angiography was conducted in the neutral position and in the same position where the VA occlusion was found, according to researchers.

Chronic vertebral basilar artery occlusion is one of the most common causes of ischemic stroke, which accounts for roughly 20% of all cases. However, the evidence for the precise clinical effect in ...

Cerebellar and Posterior Cerebral Artery Infarctions: Diffusion-weighted MRI scans. Note the acute infarctions in the right cerebellum and left occipital/temporal lobe. This picture is consistent with ...

Carotid Artery Dissection: (Left) Right Carotid Angiogram at the level of the carotid bifurcation; (Middle) Right Carotid Angiogram at the level of the base of the skull; (Right) Axial CT scan 3 days ...

Retinal artery occlusion, or eye stroke, can cause sudden and permanent vision loss. Learn about its causes, symptoms, and treatment.

Your Good Health: Occlusion of artery calls for medical therapy Control of blood pressure, exercise and diet are among the strategies for people with blockages ...