3D Electroanatomic Activation Map in a 61-Year-Old Man With Mitral Valve Repair and SAFA (PV Isolation Using Cryoenergy)
Showing a focal AT with earliest atrial activation (white colored area) in the posterior LA between the mitral annulus and the left inferior PV with centrifugal spread to the rest of the LA. (A) Local electrogram at the successful ablation site (arrow) is earlier than the reference electrogram at CS 7,8 and precedes the p-wave. Focal ablation terminated the tachycardia. A left common and both right PVs were reconnected requiring repeat isolation. (B) LA voltage map showing low-voltage area in the mitral isthmus (arrow). (C) Left anterior oblique fluoroscopic view showing successful ablation site of the focal AT at the posterolateral mitral annulus. AT = atrial tachycardia; PV = pulmonary vein; 3D = three-dimensional; other abbreviations as in Figures 1 and 2.