Andreas Müssigbrodt1, Gerhard Hindricks2, Andreas Bollmann2. 1. Department of Electrophysiology, Heart Centre, University Leipzig, Strümpellstrasse 39, Leipzig 04289, Germany andreas.muessigbrodt@gmail.com. 2. Department of Electrophysiology, Heart Centre, University Leipzig, Strümpellstrasse 39, Leipzig 04289, Germany.