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Left gastric artery

Recommended video: Arteries of the stomach, liver and spleen [14:13]
Arteries which supply the stomach, liver and spleen.
Left gastric artery (Arteria gastrica sinistra)

The left gastric artery is the first and smallest branch of the celiac trunk which descends along the superior half of the lesser curvature of the stomach, anastomosing with the right gastric artery.

The left gastric artery gives off esophageal branches and supplies the upper right portions of the fundus and body of the stomach, as well as the distal (abdominal) esophagus.

This article will discuss the anatomy and function of the left gastric artery.

Key facts about the left gastric artery
Origin Celiac trunk
Branches Esophageal branches, anterior and posterior terminal branches
Supply Distal esophagus, lesser curvature of stomach
  1. Course
  2. Branches and supply
  3. Sources
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After emerging from the celiac trunk, the left gastric artery crosses over the left crus of the diaphragm and ascends towards the gastroesophageal junction.

The artery then abruptly turns anteroinferiorly, and passes between the two layers of the lesser omentum.

From here, its branches descend along the lesser curvature of the stomach forming an anastomosis with those of the right gastric artery at the level of the angular incisure.

Branches and supply

At the cardiac end of the stomach, the left gastric artery gives off 1-3 esophageal branches which ascend through the esophageal opening of the diaphragm and supply the distal portion of the esophagus. It then usually terminates via anterior and posterior branches which follow the lesser curvature of the stomach, supplying the right upper anterior and posterior walls of the stomach, respectively.

The posterior branches usually go on to anastomose with branches of the right gastric artery.

Find out more about the arterial supply of the main abdominal organs with our comprehensive learning materials.

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