1 Department of Cardiology II-Electrophysiology, University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude A1, Münster D-48149, Germany.
2 Department of Cardiology I - Coronary and Peripheral Vascular Disease, Heart Failure, University Hospital Münster, Albert-Schweitzer-Campus 1, Gebäude A1, Münster D-48149, Germany.