Patient Characteristics
Twelve (29%) and 29 (71%) patients were classified into the EC and
non-EC groups, respectively (Figure 2). Representative electroanatomical
mapping of cases in both groups is shown in Figures 3 and 4. In all
patients in the EC group, breakthroughs were observed during RAPW
pacing, not during the RAA pacing. A trend toward shorter conduction
time from the RAPW stimulus to the LA and LA excitation time in the EC
group was observed compared with the non-EC group (48.5 ± 12.2 vs. 55.6
± 14.4, p = 0.18, 98.3 ± 20.2 vs. 107.2 ± 19.7, p = 0.43, respectively);
however, the differences were not significant (Table 2). The other
characteristics of the two groups are described in Table 1. The
differences in patient characteristics other than age were
nonsignificant (EC-group: 66.5± 6.6 years vs. non-EC group: 72.4± 8.3
years, p < 0.03).