2.8 Relationship between the fibrotic tissue properties, AF
rotors, and AF recurrence
After the ablation, the patients were monitored every 1-3 months. AF
recurrence was defined as AF of a duration of ≥30 seconds documented
more than several times after the 3-month blanking period. We
investigated the tissue properties of the NPAs and relationship between
the NPAs and ablation lesions.