Vasospastic angina (VSA) is caused by brief spasms of the main coronary artery and its major branches, resulting in varying degrees of luminal occlusion. Although vasodilator therapy is widely used and significantly alleviates VSA symptoms, it has not led to notable improvements in the prognosis of patients with VSA. Recent studies have suggested that inflammation plays a crucial role in VSA. This study aimed to evaluate the potential effectiveness of immunomodulatory therapy for improving patient prognosis.

Inclusion Criteria:

(1) Transient total or subtotal occlusion of the coronary artery (contraction >90%) observed either spontaneously or in response to irritant stimulation (typically acetylcholine, ergot, or hyperventilation); (2) Presence or absence of ischemic electrocardiogram changes during episodes; (3) Nitrate-responsive angina during spontaneous episode: rest angina and/or marked diurnal variation in exercise tolerance and/or episodes precipitated by hyperventilation and/or suppression of episodes by calcium channel blockers.

Exclusion Criteria:

(1) age 15 years or older; and (2) suspected VSA with chest pain and evidence of coronary spasm, or VSA diagnosed intraoperatively or at discharge.

The following exclusion criteria were applied: (1) failure to meet the diagnostic criteria for VSA; (2) presence of aortic disease, cardiomyopathy, malignant tumor, Kounis syndrome, or other diseases that may affect the outcome; (3) insufficient clinical data available; and (4) loss to follow-up.

160 participants with suspected VSA between October 2018 and April 2024 were selected. After the screening process, 71 participants were included in the analysis. The participants were divided into two groups according to the treatment received, with 50 and 21 participants in the traditional and immunomodulatory therapy groups, respectively.

We are working hard to have IPD sharing plan and are willing to share it with other researchers.