Claudio Pandozi, Giovanni Luca Botto, Maria Luisa Loricchio, Matteo D'Ammando, Carlo Lavalle, Giuseppe Del Giorno, Andrea Matteucci, Marco Valerio Mariani, Daniele Nicolis, Luca Segreti, Andrea Antonio Papa, Maria Carla Casale, Marco Galeazzi, Maurizio Russo, Natale Di Belardino, Gemma Pelargonio, Carlos Centurion Aznaran, Maurizio Malacrida, Francesco Maddaluno, Simona Treglia, Francesco Piccolo, Furio Colivicchi
BACKGROUND: The mechanism of typical slow-fast atrioventricular nodal re-entrant tachycardia (AVNRT) and its anatomical and electrophysiological circuit inside the right atrium (RA) and Koch's Triangle (KT) are not well known. OBJECTIVE: To identify the potentials of the compact AV node and inferior extensions and to perform accurate mapping of the RA and KT in sinus rhythm (SR) and during AVNRT, to define the tachycardia circuit. METHODS: Consecutive patients with typical AVNRT were enrolled in 12 Italian centers and underwent mapping and ablation by means of a basket catheter with small electrode spacing for ultrahigh-density mapping and a modified signal-filtering toolset to record the potentials of the AV nodal structures...
January 7, 2024: Journal of Cardiovascular Electrophysiology