Figure 2 . Voltage and activation maps after CBA.
A: Posterior–anterior (PA) view of the voltage map before CBA. Local electrograms were acquired during AF.
B: PA view of the voltage map after CBA. After CBA including LA roof ablation, cardioversion was delivered, and mapping after CBA was performed during sinus rhythm. A broad scar area was observed beyond PVs in the LAPW around the LA roof.
C: PA view of the activation map after CBA. The activation map during sinus rhythm shows conduction from caudal to cranial in the LAPW. The activation propagates from red to purple.
AF, atrial fibrillation; CBA, cryoballoon ablation; LA, left atrial; LAPW, left atrial posterior wall; PV, pulmonary vein.