Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology, Volume 23, Issue 3, 1 1 2021, Pages 379 An accessory pathway with automaticity and bidirectional conductive capacity. Bruyndonckx L, de Riva Silva M, Blom NA, Bertels RA