Analysis of subclavian steal syndrome by transcrinial Doppler ultrasound / 中国综合临床

ABSTRACT

Objective To analyse subclavian steal syndrome(SSS)by transcrinial Doppler ultrasound (TCD)and to explore the rdationship between the different degrees of subelavian artery(SUBA)and the degree of steal blood vertebral artery and clinieal value of TCD.Methods Thirty seven patients of SSS were divided into three groups according to vdoeity of SUBA and direction of vertebral artery.The stenosis of SUBA and steal degree were compared.Results Mild and moderate stenosis of SUBA were found in 15 cases with no steal and stage Ⅰ steal in 12 cases(80%);Severe stenosis of SIJBA was found in 14 cases with no steal and stage Ⅰ steal in 3 cases(21%),with significant difference between the two groups(P＜0.05).In mild and moderate stenosis group,there were 3 cases of stage Ⅱ and Ⅲ steal(20%)while in severe stenosis group there were 11 cases of stage Ⅱ and Ⅲ steal (78%),among which,the signifieant difference(P＜0.05)was observed.Stage Ⅲ steal was found in 2 cases of severe stenosis group(14%)and 7 cases of occlusion group(87%),with significant difference(P＜0.05).10 cases were found to have bilateral SUBA stenoeis,including 1 case of bilateral steal.4 cases underwent digital subtraction angiography(DSA)which results were in accordance with the results of TCD.5 cases underwent CT angiography,the results of 3 of which were similar with TCD but 2 cases did not show any abnormality.Steal happened from vertebral artery(VA)-VA in 28 cases(75.6%)and basal artery(BA)-VA in 9 cases(24.4%).Conclusion TCD could be used to diagnose SSS and the degree of steal blood.The degreo of SUBA stenosis is related to degree of vertwbral artery steal.