1. University Heart Center; Department of Cardiology - Electrophysiology; Hamburg Germany
2. University Hospital Cologne, Heart Center; Department of Electrophysiology; Cologne Germany
3. University Medical Center Hamburg-Eppendorf; Department of Diagnostic and Interventional Radiology; Hamburg Germany
4. Philips Research Hamburg; Germany
5. University Heart Center; Department of General and Interventional Cardiology; Hamburg Germany