Yes, IR angiography and embolization are highly effective for suspected gastric bleeding, particularly when endoscopy fails or is not feasible.
For gastric bleeding refractory to endoscopic treatment or when endoscopy cannot definitively treat the source, visceral arteriography with embolization is the recommended next step, with success rates of 88-100% for diagnosis and 80-100% for clinical hemostasis 1, 2.
When to Proceed with IR Intervention
Primary Indications:
- Endoscopically confirmed gastric bleeding that cannot be treated endoscopically - This is your clearest indication 1
- Continued bleeding after failed endoscopic treatment 1
- Hemodynamically unstable patients where endoscopy may be too risky 3
- Gastric cancer or tumor-related bleeding refractory to endoscopy (angiography detects active bleeding in 22.4% of these cases) 1
The Algorithmic Approach:
Step 1: Hemodynamic Status Assessment
- If unstable → CTA first to localize, then proceed directly to angiography with embolization 3
- If stable but endoscopy failed → angiography is appropriate 1
Step 2: Angiographic Findings Determine Action
- Active extravasation seen → Embolize the feeding vessel (left gastric artery for gastric bleeding) 2
- No extravasation seen → Do NOT embolize blindly - this is a critical safety point 3
Technical Success and Outcomes
The evidence strongly supports gastric artery embolization:
- Technical success: 95-100% 2, 4
- Clinical success: 80-100% 2, 4
- Rebleeding rate: 5-15% 2, 4
- Procedure-related mortality: 0% in recent series 2
For gastric bleeding specifically, left gastric artery embolization is the target vessel 2.
Critical Caveats and Pitfalls
The "Empiric Embolization" Controversy:
While some studies suggest empiric gastroduodenal artery embolization (without visualized extravasation) may be safe for duodenal bleeding 4, the 2024 ACG/SAR consensus explicitly states: "In the absence of active extravasation at angiography, embolization should not be performed, as the exact site of bleeding is not identified" 3. This is to prevent bowel ischemia in the wrong territory.
Bowel Ischemia Risk:
- Occurs in up to 10% of cases, though most are asymptomatic 3
- Higher risk with particle/glue embolization (5.3%) versus coils alone (0%) 3
- Use coils with or without additional agents - avoid coils alone as they have higher clinical failure rates 5
Predictors of Failure:
Be cautious in patients with:
- Pre-procedure anticoagulant use 5
- Corticosteroid use 5
- Vasopressor requirement 5
- These factors significantly increase clinical failure rates and mortality 5
Practical Technique Points
Vascular Access: Common femoral or radial artery 3
Embolic Agents: Permanent agents (microcoils, glue) targeting the specific bleeding vessel 3. Recent data favors coils with additional embolic materials over coils alone 5.
Pre-procedure Imaging: CTA can guide the angiography by identifying the bleeding site and mapping vascular anatomy 3, though angiography remains the definitive diagnostic and therapeutic modality.
When NOT to Proceed
- No active extravasation visualized on angiography - embolization risks ischemia without benefit 3
- Variceal bleeding - requires different approach (TIPS, BRTO) 6
- Severe atherosclerotic disease preventing catheter navigation 1
- Anaphylactic contrast allergy (absolute contraindication) 1
The 2024 guidelines 1, 3 firmly establish angiographic embolization as standard care for endoscopically refractory gastric bleeding, with excellent safety and efficacy profiles when performed with appropriate patient selection and technique.