Figure 2:

Coherent maps show tachycardia activation (color-coded; red—early to purple—late points) and conduction velocity vectors displaying the electric wave propagation. The top panel includes the entire left atrial chamber divided into (A) anterior, (B) left lateral, (C) posterior, and (D) right lateral segments, with white arrows tracking the activation sequence. The bottom left panel (E) shows the early-meets-late activation segment between the left atrial anterior wall and the right superior pulmonary vein. The pink, red, and green dots represent the start and end ablation points, ablation lesions, and tachycardia termination point, respectively. The brown line represents the previously ablated anterior mitral isthmus line, which was incomplete. The Coherent tachycardia cycle length loop also confirms the entire 390-ms cycle length confined in the left atrium. The bottom right panel shows intracardiac electrocardiograms recorded in the coronary sinus (CS) and ablation catheter (MAP) during tachycardia and in sinus rhythm upon termination during the application of RF energy, represented by the brown bar at the bottom.