Touch-up ablation
In the CBA group, the rate of touch-up ablation was 20%, which was very
high in our participant cohort. Based on our data, it is difficult to
evaluate the relationship between the rate of touch-up ablation and HD.
From a post-marketing surveillance report in Japan, 15.9% of patients
needed treatment with focal ablation in addition to
CBA.15 From the North America registry study, 7.3% of
patients needed treatment with focal ablation in addition to
CBA.16 Thus, there is a gap in the touch-up ablation
rate in each report. One possible reason is the difference in
institutional and operator volume. In our study, four out of five
patients who needed a touch-up ablation underwent CA within one year
since we started CBA in our institution. The learning curve of CBA in
our hospital should be considered for this touch-up rate. Therefore, the
high touch-up rate might be related with the institutional volume, not
with HD.