P-SAECG findings and AF recurrence
The P-SAECGs of representative patients are shown in Figure 2. The left and right panels show the P-SAECGs of one patient each from the Recurrence (RMS20: 1.6 μV, PWD: 128 ms) and Non-Recurrence (RMS20: 3.1 μV, PWD: 91 ms) groups, respectively. The representative patient from the Recurrence group met both the criteria for ALP positivity. Table 2 shows positive ALP rates of both groups. The rate of positive ALP was significantly higher in the Recurrence group than in the Non-Recurrence group (85.7% vs. 63.9%,P =0.04).
Predictors of AF recurrence
Sex, PVI alone, and positive ALP were included in the multivariate analysis because they had P- values <0.20 in the univariate analysis. In the multivariate analysis, positive ALP was an independent predictor of AF recurrence (odds ratio: 3.83, 95% confidence interval: 1.05–14.1, P =0.04, Table 3).