Figure 1.
The ablation lesions for the three strategies. (A) For circumferential pulmonary vein isolation (CPVI) ablation, continuous circumferential lesions were created at the level of the left atrial (LA) antrum (about 2 cm from the pulmonary vein (PV) ostia) encircling the right and left PV. (B) In addition to CPVI, the roof line (RL) was created on the LA roof connecting the tops of two encircling lesions. (C) In addition to CPVI+RL, the PostBox lesion was generated by additional posterior inferior line connecting the lower margins of the right and left CPVI lines.