1. Clinic for Interventional Electrophysiology, Heart Centre Bad Neustadt , Von-Guttenberg-Straße 11, 97616 Bad Neustadt a. d. Saale , Germany
2. Department of Cardiology and Angiology, Philipps-University Marburg , Baldingerstraße, 35034 Marburg , Germany
3. First Department of Medicine, University Medical Centre Mannheim (UMM) , Theodor-Kutzer-Ufer 1-3, 68167 Mannheim , Germany
4. Department of Cardiology , Oldenburg, Rahel-Straus-Straße 10, 26133 Oldenburg Germany