1. Miyako Igarashi et al. JACEP 2018;4:339-350
Substrate Mapping in LV and Pace Mapping at AA (A, B) Endocardial substrate mapping during atrial pacing or sinus rhythm in LV in a representative case (case 12). (B) At the anterior wall of AA, LVA was recorded in the 3D mapping system. Along the border of the LVA, late potentials were recorded (A, arrow; B, light blue tags). (C) Twelve-lead ECGs during clinical VT and pace mapping. Good pace-mapping was obtained along the septal border of the LVA. The time from stimulation to QRS onset at near apex (dotted black arrow) was 65 ms, whereas it was 10 ms at the aneurysmal neck side (solid black arrow). Therefore, we supposed that the common isthmus of VT was along the septal border of the LVA and that the exit was at the aneurysmal neck side (B, yellow arrow). Induced clinical VT was hemodynamically unstable; therefore, linear ablation during sinus rhythm was performed across the isthmus at the aneurysmal neck side and along the isthmus at the septal border of the LVA. Blue dots = good pace-mapping site; light blue dots = late potential; LV = left ventricle; LVA = low-voltage area; red dots = ablation sites; other abbreviations as in Figure 1.
Miyako Igarashi et al. JACEP 2018;4:
2018 American College of Cardiology Foundation