Mapping of low-voltage bridges with a high-density multipolar catheter in a child with atrioventricular nodal reentry tachycardia

The new Advisor HD Grid Sensor Enabled mapping catheter (Abbott Medical Italia S.p.A., Agrate Brianza, Italy) has been recently used in different clinical settings. This new multipolar catheter with small electrodes and very short inter-electrode space has been proved to be effective and safe in left atrial mapping for atrial fibrillation ablation procedures,1 as well as for right ventricle premature ventricular contraction mapping2 and for left ventricle epicardial mapping.In the last years, different authors have described 3D voltage mapping of the Koch triangle in order to find lowvoltage bridges as targets for a successful transcatheter ablation (TCA) of the slow pathway in children.4 Although this new strategy seems to be very promising, mapping can be difficult, operator-dependent, and time-consuming.