A 29-year-old man presented with acute upper gastrointestinal bleeding

A 29-year-old man was admitted to the emergency department of Taleghani hospital; a teaching referral hospital in Tehran, Iran, with an acute upper gastrointestinal (GI) bleeding. On admission, he was found to have severe hematemesis since 6 hours before his arrival following an episode of intractable nausea and vomiting. He was single, residing in Tehran, Iran. He had a history of a 10 pack-year smoking, opium addiction and social alcohol consumption but denied usage of other illicit drugs, other medications including NSAIDs and other over-the-counter drugs. He had a history of stab wound 5 years ago leading to pneumohemothorax requiring a chest tube insertion. He did not mention any melena, defecation and gas passing since 2 days ago. He was not found to have any significant abdominal pain on admission. Four hours post admission, he was still conscious and oriented to the questions we were asking and he was still complaining about severe nausea. He had a temperature of 37.8o C.....