1 Arrhythmia Division, Department of Cardiology, Heart Center Lucerne, Lucerne Cantonal Hospital, Lucerne, Switzerland; Department of Cardiology and Angiology, Medical Center, University of Freiburg, Freiburg, Germany; Faculty of Medicine, University of Freiburg, Freiburg, Germany. Electronic address: amir.jadidi@luks.ch.
2 Institute of Biomedical Engineering, Karlsruhe Institute of Technology, Karlsruhe, Germany.