The evaluation of intra-and extra-cranial circulation in subclavian steal syndrome  

作　　者：黄一宁 高山 汪波 李舜伟 

出　　处：《Chinese Medical Journal》1997年第4期47-49,共3页中华医学杂志（英文版）

摘　　要：Objective To compare the efficacy of transcranial Doppler ultrasound (TCD) and digital subtraction angiography (DSA) in identifying the clinical and hemodynamic relationship between intra and extra cranial circulation and subclavian steal syndrome. Methods Sixteen patients were collected. The intra and extra cranial arteries were insonated with Doppler ultrasound. DSA and brain CT were performed in all patients. The relationship between the grade of arterial stenosis showing in DSA and the flow direction showing in TCD was studied. Results TCD showed reversal flow of the vertebrobasilar artery in 13 patients, normal flow in 3, which was influenced obviously by fist clenching. In the hyperemia test, the flow velocity and the direction changed significantly in all patients. The steal phenomenon of the middle cerebral artery (MCA) was coincident with that of the arterial cerebral artery (ACA) in 2 cases. Stenosis of MCA or ACA was found in 5 cases (31%). Nine patients were treated with arterial bypass or angioplasty. TCD was performed during the follow up. Conclusions Reversal flow of the vertebral artery may occur in rest or only in exercise, depending on the grade of subclavian arterial stenosis. Hyperemia test is the most sensitive index. It is necessary to monitor blood flow in the MCA and basilar artery in hyperemia test. The coexistence of intra and extra cranial arterial stenosis is common.Objective To compare the efficacy of transcranial Doppler ultrasound (TCD) and digital subtraction angiography (DSA) in identifying the clinical and hemodynamic relationship between intra and extra cranial circulation and subclavian steal syndrome. Methods Sixteen patients were collected. The intra and extra cranial arteries were insonated with Doppler ultrasound. DSA and brain CT were performed in all patients. The relationship between the grade of arterial stenosis showing in DSA and the flow direction showing in TCD was studied. Results TCD showed reversal flow of the vertebrobasilar artery in 13 patients, normal flow in 3, which was influenced obviously by fist clenching. In the hyperemia test, the flow velocity and the direction changed significantly in all patients. The steal phenomenon of the middle cerebral artery (MCA) was coincident with that of the arterial cerebral artery (ACA) in 2 cases. Stenosis of MCA or ACA was found in 5 cases (31%). Nine patients were treated with arterial bypass or angioplasty. TCD was performed during the follow up. Conclusions Reversal flow of the vertebral artery may occur in rest or only in exercise, depending on the grade of subclavian arterial stenosis. Hyperemia test is the most sensitive index. It is necessary to monitor blood flow in the MCA and basilar artery in hyperemia test. The coexistence of intra and extra cranial arterial stenosis is common.

分 类 号：R442.8[医药卫生—诊断学]