JJanoušek, R AGebauer, HAbdul-Khaliq, MTurner, LKornyei, OGrollmuß, ERosenthal, EVillain, AFrüh, TPaul, N ABlom, J-MHapponen, UBauersfeld, J RJacobsen, Fvan den Heuvel, TDelhaas, JPapagiannis, CTrigo, for the Working Group for Cardiac Dysrhythmias and Electrophysiology of the Association for European Paediatric Cardiology