Ablation outcomes
Ablation of these 27 pseudo-focal ATs required a total of 32 attempts
aiming either to target the focal emergence in 6 cases, or to block an
anatomical isthmus of the circuit in 26 cases. Termination was achieved
in 25 pseudo-focal ATs (93%). Blocking an anatomical isthmus was
significantly more efficient than targeting the endocardial emergence
[24/26 (92%) vs. 1/6 (17%); p
< 0.001]. Details for
each type of epicardial bypass are shown in Table 2 . After a
mean follow-up of 15 ± 13 months, arrhythmia recurrence was observed in
9 patients (35%). During the repeat procedure, the same circuit as in
the index procedure was observed in one-third of these patients (12%).