Successful Atrioventricular Nodal Re-entrant Tachycardia Ablation with High Density Mapping of the Voltage Bridge and Propagation Analysis using Coherent: A New Workflow

This case report refers to three case of patients who underwent Ablation of Nodal Reentrant Tachycardia (AVNRT) with the aid of high-density mapping catheters (Pentaray and Octaray) to identify and better characterize the zone of the slow pathway in Koch’s triangle and the voltage bridge. So it become essential to perform an accurate mapping of the Koch’s triangle with the 3D Electroantomical (EA) mapping system (CARTO® 3 Webster) to accurately define the ablation target area. As it results, in all three cases a more precise localization of the slow pathway is obtained and the procedure time and the number of radiofrequency deliveries are reduced compared to the traditional approach. Furthermore, the result is even more evident with the use of octaray catheter which allows to collect a large number of points for an even more precise mapping. This is the first case of use of this type of catheter in the setting of Ablation of Nodal Reentrant Tachycardia (AVNRT) ablation.