Wang N, et al. - Researchers investigated the factors associated with an increased risk of acute coronary syndrome (ACS) occurrence after upper gastrointestinal hemorrhage (UGH) in this population-based nested case-control study analyzing the hospital information system database of Shengjing Hospital of China Medical University from September 1, 2009 to December 31, 2014. Risk of ACS in elderly patients with UGH was enhanced in association with diabetes, smoking, vasopressin or terlipressin use, liver cirrhosis, hemoglobin level, smoking, and history of ACS. Importantly, key variables for mortality included diabetes, smoking and lower hemoglobin level.