“…Previous studies have reported a 0.35% to 5.7% incidence of GI bleeding after cardiac surgery despite the use of prophylactic antacid agents other than PPIs [Halm 2000;van der Voort 2000;Hata 2005], albeit the patients' characteristics in these studies differed considerably. Although UGIE findings might have been present before surgery, the incidence of gastroesophagitis (including superficial gastritis, erosive gastritis, and esophagitis) was 30% in our study, which is within the previously reported range of 12.2% to 68.0% [Zacharias 2000;D'Ancona 2003;Hata 2005Hata , 2006]. Up to 52.5% of the patients had insidious gastroesophagitis and hiatal hernia, even during sufficient PPI therapy.…”