1. Masatoshi Yamazaki et al. JACEP 2015;1:256-269
DFmax/Rotor Ablation and AF Termination (A to D) Sheep 1. (E to G) Sheep 4. (A) DF and RI maps. Representative example of corresponding DF and RI maps (see Methods section). (B) Single-pixel electrograms from the DFmax region (black star) and from the boundary of the DFmax region (black X). (C) Region targeted (white circle, upper panel). The lower panel is a phase video snapshot. The targeted location is the region located between the 2 figure-of-8’s cores (white arrow) (see also Online Video 1). (D) Bipolar electrograms from multiple atrial locations show AF termination after ablation. (E) Representative bipolar electrogram recordings at the LAFW, PVJ, and RAA with their corresponding DF spectrum. The DFmax domain was located at the LAFW and encompassed the rotor (not shown). (F) Epicardial-endocardial phase video snapshots showing a counter-clockwise rotor. The ablation catheter tip was positioned on the rotor core (shaded region). Interestingly, this region is located at the junction between thick and thin myocardium (photographic snapshot). (G) AF termination during DFmax/rotor ablation. AF = atrial fibrillation; DF = dominant frequency; PVJ = pulmonary vein junction; RI = regulatory index; RAA = right atrial appendage; other abbreviations as in Figure 2.
Masatoshi Yamazaki et al. JACEP 2015;1:
American College of Cardiology Foundation