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《Neural Injury and Functional Reconstruction》 2014-06
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Evaluation of Cerebrovascular Reserve Capacity in Patients with High-grade Carotid Stenosis by Transcranial Doppler Sonography with Breath-holding Test

SUN Guo-bing;XU Kang;YU Dan-fang;TAN Qian;Department of Neurology, Hubei Xinhua hospital;  
Objective: To evaluate the cerebrovascular reserve(CVR) capacity in patients with high-grade carotid stenosis by transcranial Doppler sonography(TCD) with breath-holding test. Methods: Thirty healthy controls and 26 patients with high-grade carotid stenosis(stenosis group) were enrolled. There were 14 asymptomatic patients with carotid stenosis(asymptomatic subgroup) and 12 symptomatic patients(symptomatic subgroup) in the stenosis group. Nine symptomatic patients were given carotid angioplasty stenting(CAS) operation. The breath-holding index(BHI) of each group and the BHI change before and after the CAS operation were assessed. The CVR capability was evaluated with BHI. Results: Compared with the BHI in the normal control group, the BHI of the stenotic arteries in the stenosis group was significantly lower(P=0.000). The BHI of the stenotic arteris in the symptomatic subgroup was lower than that in the asymptomatic group(P=0.000). In the symptomatic subgroup, the BHI of the stenotic arteries after the CAS operation was higher than that before the operation(P=0.021), and was lower than the BHI of the normal arteries(P=0.019). Conclusion: The CVR capacity in patients with high-grade carotid stenosis were impaired, especially in the symptomatic patients with carotid stenosis. The impaired CVR capacity of the stenotic arteries in patients with symptomatic unilateral high-grade carotid stenosis can be improved after CAS.
【Fund】: 2012年武汉“步长杯”脑血管病科研基金
【CateGory Index】: R743.3
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