| Advantages |
| Therapeutic interventions can also be performed |
| Can be used in hemodynamically unstable patients |
| Can localize exact site and cause |
| No bowel preparation required |
| Disadvantages |
| Embolization and vascular access site related side effects |
| Ionizing radiation and contrast related side effects |
| Cannot detect very slow bleed |
| Poor performance in variable arterial anatomy |
| Recommendation |
| For LGIB, hemodynamically unstable patients: initial modality of choice |
| Recurrent/continuous bleeding after post colonoscopic treatment for LGIB |
| For UGIB, acutely bleeding patients with negative endoscopy or where endoscopy could not find source (specially hemodynamically unstable patients) |
