目的　探讨蛛网膜下腔出血血管造影阴性病例动脉瘤自闭假说的真实性 ,以及导致动脉瘤自闭发生的相关因素。方法　回顾性分析临床上出现的经全脑血管造影证实的 4例明确的动脉瘤病例动脉瘤自闭现象 ,对导致动脉瘤自闭发生的因素进行了分析。结论　在蛛网膜下腔出血全脑血管造影阴性时 ,要考虑到动脉瘤自闭的可能 ,不论是否巨大动脉瘤 ,均有发生自闭的可能。与动脉瘤自闭有关的因素有 :血流速度的改变、动脉瘤的大小、形态、部位及动脉瘤的瘤体方向等 Objective To explore the authenticity of aneurysm autonomic hypothesis in patients with negative subarachnoid hemorrhage angiography and related factors leading to autonomic closure of aneurysms. Methods A retrospective analysis of 4 cases of aneurysm aneurysm confirmed by whole brain angiography in clinic was performed to analyze the factors leading to autonomic aneurysm. Conclusion In patients with SAH negative cerebrovascular angiography, we should consider the possibility of autonomic aneurysm, whether or not a huge aneurysm, have the possibility of autistic. Autotolous aneurysm-related factors are: changes in blood flow velocity, aneurysm size, shape, location and aneurysm of the tumor direction