1. Department of Internal Medicine II (Cardiology, Pneumology, and Intensive Care), University Medical Center Regensburg, 93053 Regensburg, Germany
2. Department of Cardiothoracic Surgery, University Medical Center Regensburg, 93053 Regensburg, Germany
3. Department of Anesthesiology, University Medical Center Regensburg, 93053 Regensburg, Germany
4. Center for Clinical Studies, University Medical Center Regensburg, 93053 Regensburg, Germany
5. Department of Cardiology, Maastricht University Medical Centre, 6229 ER Maastricht, The Netherlands
6. Discipline of Biomedical Engineering, School of Electrical and Mechanical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia