2.3 | Acute endpoints
The acute endpoints of the procedure include complete PVI, LAPW
isolation, and bidirectional linear block (CTI block and MI block) after
a 20-minute waiting period. PVI and LAPW isolation were confirmed by the
absence of electrograms in PV and LAPW (Figure 2C ). Bidirectional MI
block was confirmed by the following criteria: 1)Proximal-to-distal CS
activation pattern when pacing at the left lateral ridge; 2) Longer SA
interval at the left lateral ridge when pacing at the distal CS compared
to pacing at the proximal CS (Figure 3 ). Bidirectional CTI block was
confirmed by the activation from the right atrium lateral wall to the
ablation line when pacing at proximal CS. The SA interval near the
ablation line was longer than at the right atrium lateral wall when
pacing at proximal CS (Figure 4 ).