1. Department of Cardiology and Cardiovascular Medicine, University Hospital, Eberhard Karls University Tuebingen, Otfried-Mueller-Straße 10, 72076 Tuebingen, Germany
2. Department of Anaesthesiology, University Hospital, Eberhard Karls University Tuebingen, Hoppe-Seyler-Straβe 3, 72076 Tuebingen, Germany
3. Department of Cardiovascular Surgery, University Hospital, Eberhard Karls University Tuebingen, Hoppe-Seyler-Straβe 3, 72076 Tuebingen, Germany