Carotid stenting dilation and cerebral angiography. Carotid stenting is the preferred therapy for patients who are at an increased risk with carotid surgery. High risk factors include medical comorbidities (severe heart disease, heart failure, severe lung disease, age > 75/80, etc.) and anatomic features (contralateral carotid occlusion, radiation therapy to the neck, prior ipsilateral carotid artery surgery, intra-thoracic or intracranial carotid disease) that make surgery difficult or risky. Anatomic high surgical risk: Co-morbid high surgical risk: Using the criteria of successful trials, candidates are either symptomatic (TIA or stroke) patients with >50% stenosis of the carotid artery, or are asymptomatic with >80%
Striate arteries ventricular system. Lacunar infarcts may have serious functional consequences if they involve motor or sensory fibers in the internal capsule or may be "silent" if they involve other small regions of white matter or the basal ganglia. Striate arteries Striate arteries or ganglionic arteries arise from the middle cerebral artery and supply deep structures in the cerebrum, including the internal capsule and reticular formation. Strokes in these vessels are common and can cause extensive damage. This is because emboli are carried up the carotid and tend to be swept into the MCA, sometimes called the "artery of stroke", and are