Methods: Twelve patients were diagnosed as variant angina, depending on ST segment elevation of 12 leads electrocardiograph (ECG) while having chest pain at rest, and ST segment return to baseline.

• 方法：根据在静息状态下发生心绞痛，床旁12导联体表心电图或动态心电图监测证实心绞痛发作时ST段抬高，胸痛缓解后ST段恢复至基线，有12例患者确诊为变异型心绞痛。