<prompt> Artery to bleed in duodenal ulcer haemorrhage -Splenic arteryGastroduodenal arteryLeft gastric arterySup. mesenteric artery  <response>: Gastro duodenal artery is the most common artery involved in duodenal ulcer hemorrhage.Also, rememberA peptic ulcer is the most common cause of massive upper gastrointestinal bleed Duodenal ulcers Gastric ulcersBleeding ulcers in the duodenum are usually located on the posterior surface of the duodenal bulb. 