Discussion
To the best of our knowledge, this is the first study to examine the
optimal AI value for the SVCI. The major findings in our study were as
follows: 1) Touch up ablation was frequently needed in the area close to
the phrenic nerve or sinus node. 2) The optimal AI value for the SVCI
was 350, and at least 308 would be needed. 3) The amplitude of the SVC
was asymmetric and was higher in the anterior area and septal areas than
lateral and posterior areas.