Association between brachial-ankle index and severe subclavian artery stenosis / 中华老年心脑血管病杂志

ABSTRACT

Objective To study the association between brachial-ankle index (BAI) and severe subclavian artery stenosis.Methods Seventy severe subclavian artery stenosis patients with a stenosis rate ≥70％ admitted to our hospital served as a stenosis group and 70 subclavian artery stenosis-free patients served as a control group in this study.Their BAI,pulse wave upstroke time (UT) and pulse wave form were recorded with a noninvasive automatic peripheral arterial device.The sensitivity,specificity,accuracy,positive and negative prediction value of BAI in diagnosis of subclavian artery stenosis were calculated.Results The BAI of stenosis-involved extrmities was significantly lower while the pulse wave UT was significantly longer in stenosis group than in control group (0.6±0.1 vs 0.9±0.1 and 0.9±0.1,261.0±11.8 vs 188.0±12.1 ms and 186.0±12.6 ms,P＜0.01).The low obtuse pulse wave form and low plain pulse wave form were detected respectively in stenosis involved extrmities of 58 patients (82.9％) and 11 patients (15.7％) of stenosis group.The sensitivity,specifity,accuracy,positive and negative prediction value of BAI in diagnosis of severe subclavian artery stenosis were 44.3％,92.9％,68.6％,86.1％ and 62.5％ respectively.Conclusion The specifity,positive prediction value and accuracy of BAI＜ 0.70 are rather high in diagnosis of severe subclavian artery stenosis.