Venous stenosis is the most common cause of arteriovenous fistula (AVF) failure in hemodialysis patients. For patients with AVF stenosis, the pressure over the antecedent part of the AVF stenotic lesion will increase if arterial inflow is sufficient. We report a chronic hemodialysis patient who received an angiographic examination for the juxta-anastomosis stenosis of his AVF. A unique feature of a collateral venous branch antecedent to the stenotic lesion was noted, resembling a musical sign as the “eighth note.” After percutaneous transluminal angioplasty, the eighth note attenuated markedly at once. Of note, the eighth note sign is not seen frequently, and thus we postulate that the formation of an eighth note sign on the radiocephalic fistula should fulfill the following requirements, including a sufficient arterial inflow, an adjacent collateral branch close enough to the arteriovenous anastomosis, a severe juxta-anastomotic stenotic lesion, and an intact ulnar venous drainage system.

静脉狭窄是血液透析患者动静脉瘘 (AVF) 失败的最常见原因。对于 AVF 狭窄患者，如果动脉流入充足，AVF 狭窄病变前部的压力会增加。我们报告了一名慢性血液透析患者，他接受了血管造影检查，发现其 AVF 的吻合口狭窄。注意到狭窄病变之前的侧支静脉分支的独特特征，类似于“八分音符”的音乐符号。经皮腔内血管成形术后，八分音符立即明显减弱。值得注意的是，八分音符并不常见，因此我们假设在桡头瘘上形成八分音符符号应满足以下要求，包括足够的动脉流入，