There appears to be a higher prevalence of coronary spasm in patients with acute coronary syndrome(20% to38%) than in those with stable angina(

• 在急性冠状动脉症候群的病人（十到三十八个百分比）稳定性心绞痛的病人（于六个百分比）较高比率会有冠状动脉血管痉孪。