Navx with cfe software

The NavX system (NavX with CFE software, St. Jude Medical Inc., St. Paul, MN, USA) was used for catheter ablation. A 5-F deflectable catheter was inserted into the coronary sinus (CS) via the right femoral vein. The trans-septal procedure was performed using fluoroscopic landmarks, and three 8-F SL0 sheaths (St. Jude Medical Inc.) were advanced into the left atrium (LA). After the trans-septal procedure, a single bolus of 5000 U of heparin was administered. A continuous infusion with heparinized saline was administered to maintain an activated clotting time of 300–350 s. The 3-dimensional biatrial geometry was created on the NavX system, and sequential contact mapping was performed using a 7-F decapolar circular catheter (Lasso, Biosense-Webster, Inc., Diamond Bar, CA, USA). The points in each region were similar in number and nearly equally distributed. The mapping was performed during AF.

The NavX system (NavX with CFE software; St. Jude Medical, Inc) was used for catheter ablation. The three‐dimensional bi‐atrial geometry was created on the NavX system, and sequential contact mapping was performed using a 7‐F decapolar circular catheter (Reflexion™ HD; St. Jude Medical, Inc). Voltage mapping was performed to investigate the relationship between structural remodeling and electrical remodeling. Mapping was performed during sinus rhythm. In patients with non‐paroxysmal AF, voltage mapping was obtained during sinus rhythm after ablation. Mapping points were acquired to fill all color gaps on the voltage map using an electroanatomical mapping system. Each acquired point was classified according to the peak‐to‐peak electrogram as follows: healthy, >0.5 mV; diseased, 0.2‐0.5 mV; and scarred, <0.1 mV. The low‐voltage area was defined as sites of ≥3 adjacent to low‐voltage points of <0.5 mV, as described previously.¹⁷