Coronary vasospasm was defined as a reduction in luminal diameter 70% during the provocation testing which was associated with angina and/or ST-depressive or elevated changes.

• 冠状动脉痉挛的定义为冠状动脉内给予麦角新素后，冠状动脉直径减少超过70%25，并合并有胸间或心电图ST段下降或上升的变化。