Inclusion Criteria:

1. Aged 18 and above;
2. Isolated superior mesenteric artery dissection with clear symptoms or history and confirmed by CTA
3. Signed informed consent forms, willing to receive treatments

Exclusion Criteria:

1. Symptoms are severe and patients need exploratory laparotomy;
2. Patients with aortic dissection, iliac artery dissection, or autoimmune vasculitis;
3. Patients with mental illness cannot cooperate subjectively;
4. Patients who are allergic to contrast agents, or contraindicated to conservative treatment drugs, and cannot be treated with drugs;
5. Pregnancy and breastfeeding women, or patients who have recent birth plans;
6. Patients who are participating in other clinical projects;
7. Patients are not suitable to participate in this study.