1 Cardiac Arrest Center, Advanced Heart Failure Unit, Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany.
2 Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany.
3 Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany.
4 Cardiac Arrest Center, Advanced Heart Failure Unit, Department of Cardiology and Angiology, Hannover Medical School, Hannover, Germany. Electronic address: napp.christian@mh-hannover.de.