1. Department of Thoracic and Cardiovascular Surgery, RWTH University Hospital Aachen, 52074 Aachen, Germany
2. Department of Cardiology, Rhein Maas Klinikum, 52146 Würselen, Germany
3. Department of Cardiovascular Engineering, Institute of Applied Medical Engineering, Helmholtz Institute, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany
4. Department of Thoracic Transplantations and Assist Devices, Cardiothoracic Surgery, University Hospital Essen, 45147 Essen, Germany