The goal of our data acquisition and evaluation is to learn whether existing diagnostic or therapeutic procedures are of relevance in the management of acute gastrointestinal bleedings. Unlike the management of patients with various forms of accidents (e.g. polytrauma), only a few data exists on patients with acute gastrointestinal bleedings. The aim of our study is to develop optimal diagnostic and therapeutic algorithms of acute gastrointestinal bleeding. Therefore our prospective data registry should answer different questions: