Veins involve in stomach varices are
The left gastric vein(or coronary vein) carries blood low in oxygen, tributaries derived from both surfaces of the stomach; it runs from right to left along the lesser curvature of the stomach, between the two layers of the lesser omentum, to the esophageal opening of the stomach, where it receives some esophageal veins ..so the coronary veins are involved in gastric varices.
Coronary vein
Sho gastric vein
Right Gastroepiploic vein
Left Gastroepiploic vein
G.I.T