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[The collateral circulation for occlusion of the three unpaired abdominal arteries (author's transl)]
Insights
A patient with blocked abdominal aortic branches experienced minimal abdominal angina due to a robust collateral circulation system. This extensive network rerouted blood flow, preserving organ function despite severe arterial occlusion.
Area of Science:
- Vascular Surgery
- Abdominal Anatomy
- Collateral Circulation
Background:
- Occlusion of major abdominal aortic branches typically leads to severe visceral ischemia.
- Understanding collateral pathways is crucial for managing complex vascular diseases.
Observation:
- A 52-year-old patient presented with abdominal angina despite occlusion of all three unpaired abdominal aortic branches.
- An extensive collateral system was identified, supplying the coeliac trunk, superior mesenteric artery, and inferior mesenteric artery.
Findings:
- The collateral system included intercostal arteries, adrenal vessels via the inferior phrenic artery, left iliac arteries, and lumbar vessels.
- Riolan's arc (type II) facilitated supply to the superior mesenteric artery, while lumbar vessels supplied its proximal territory.
- Connections between multiple lumbar arteries were observed, with some also proximally occluded.
Implications:
- This case highlights the remarkable capacity of collateral circulation to maintain organ perfusion.
- It underscores the importance of identifying and characterizing collateral pathways in patients with extensive aortic disease.
- Knowledge of these alternative blood flow routes can inform surgical and interventional strategies.
Abstract:
A fifty-two year old patient had only a short period of abdominal angina, despite occlusion of all three unpaired abdominal aortic branches. An extensive collateral system provided the circulation to the abdominal organs: intercostal arteries and adrenal vessels through the inferior phrenic artery for the coeliac trunk; arteries from the left iliac for the inferior mesenteric artery and through Riolan's arc (type II) for the superior mesenteric artery. Lumbar vessels provided a supply to the proximal territory of the superior mesenteric artery. In addition, it was possible to demonstrate connections between several lumbar arteries; several of these were also occluded proximally.