arterial steal
Introduction
Introduction Arterial stealing blood: Carotid steal syndrome refers to the internal carotid artery occlusion, the blood flow of the internal carotid artery flows through the anterior communicating artery into the affected side, and the blood flow of the internal carotid artery flows through the anterior communicating artery into the affected side. The onset of the internal carotid artery ischemic manifestation, or the vertebral-basal artery blood flow can flow back into the affected internal carotid artery through the posterior communicating artery, resulting in vertebral-basal artery ischemic manifestations, such as bilateral internal carotid artery occlusion. The blood supply by the vertebrobasilar artery and the external carotid artery can be accompanied by damage to the brain and cerebellum. The cause is mostly the formation of atherosclerotic plates. Clinical manifestations of recurrent intracranial arterial system transient cerebral arterial insufficiency, such as transient side of the lesion side of the black, lesions of the opposite side of the limb numbness, hemiparesis, aphasia and so on. Internal carotid artery stenosis >75%, audible vascular murmur, weakened or small internal carotid artery pulse. When the ischemic symptoms appear in a blood supply area of a blood vessel and the DSA is normal, the possibility of cerebral artery reflux or steal syndrome may be considered.
Cause
Cause
When one side of the internal carotid artery is occluded, the contralateral internal carotid artery blood may flow into the affected side through the anterior communicating artery, or the vertebral-basal artery blood may flow into the internal carotid artery through the ipsilateral posterior communicating artery, thereby generating and occluding the blood vessel. Limb paralysis or sensory disturbance on the same side, or clinical manifestations of vertebral-basal artery insufficiency, such as hemiplegia, partial sensory disturbance, aphasia, etc.
Examine
an examination
Related inspection
Cardiovascular imaging of brain MRI
Clinical manifestations of recurrent internal carotid artery system TIA, such as lesion side-pass black sputum, contralateral reversible hemiparesis, limb numbness and aphasia; internal carotid artery pulsation weakened or disappeared, and can hear vascular murmur.
Diagnosis
Differential diagnosis
Differentiation from subclavian steal syndrome and vertebrobasilar syndrome:
1. Subclavian artery stealing syndrome: When one side of the subclavian artery or the innominate artery is significantly narrowed and occluded at the proximal end of the vertebral artery, if the upper limb is active, the blood flow of the affected side and the contralateral vertebral artery The affected side artery flows back into the subclavian artery and supplies the affected upper limb, thereby causing symptoms of vertebrobasilar insufficiency. The clinical manifestations include dizziness, blurred vision, diplopia, ataxia, and other symptoms of brain stem, occipital lobe and cerebellum or limb hemiparesis and sensory disturbance after upper limb movement.
2, vertebral-basal artery stealing syndrome: when the vertebral-basal artery is obviously narrowed or occluded, the blood of the internal carotid artery system flows back into the vertebral-basal artery system through the posterior communicating artery, which can produce symptoms of insufficient blood supply to one side of the cerebral hemisphere. This type is less common.
