<prompt> Aery to bleed in duodenal ulcer haemorrhage -Splenic aeryGastroduodenal aeryLeft gastric aerySup. mesenteric aery  <response>: Gastro duodenal aery is the most common aery involved in duodenal ulcer hemorrhage. Also, remember A peptic ulcer is the most common cause of massive upper gastrointestinal bleed Duodenal ulcers Gastric ulcers Bleeding ulcers in the duodenum are usually located on the posterior surface of the duodenal bulb. Ref : Bailey Love 25e p1045 