The gastroduodenal artery is an important collateral pathway between the celiac axis and the superior mesenteric artery (SMA). Stenosis at the origin of the celiac axis typically results in flow of blood from the SMA to the gastroduodenal artery via the anterior inferior, anterior superior, and posterior inferior pancreaticoduodenal arteries (part of the peripheral pancreatic circulation or pancreaticoduodenal arcade). This increased flow typically results in a dilated gastroduodenal artery.
References
- Song SY, Chung JW, Kwon JW, Joh JH, Shin SJ, Kim HB, Park JH. Collateral pathways in patients with celiac axis stenosis: angiographic-spiral CT correlation. Radiographics. 2002 Jul-Aug;22(4):881-93.
- Horton KM, Fishman EK. Multidetector CT angiography in the diagnosis of mesenteric ischemia. Radiol Clin North Am. 2007 Mar;45(2):275-88.
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