Conclusions The symptomatic cerebrovascular spasms is not only due to cerebrovascular spasm deterioration, but also due to the abnormality of blood coagulation mechanism (hypercoagulability state).

• 结论症状性脑血管痉挛的发生不仅仅是脑血管痉挛加重的结果,病人凝血机制异常即处于高凝状态也是其发病的重要原因。