Comparison of Conservative and Endovascular Treatment for Spontaneously Isolated Superior Mesenteric Artery Dissection

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.