All of the patients had a greater than50% blockage of major intracranial artery and had an experience of transit ischemic attack or non disabling stoke within the90 days prior to enroll in the study.

• 所有募集到的患者中；颅脑主动脉都有大与50%25阻塞；而且在参与研究之前的3个月内；都曾经有过短暂的大脑缺血损伤；或者曾经发生过非致残的大脑卒中.