Initial procedure
Postero-septal accessory pathways (n=8, 21%) presented with the highest
number of non-successful applications and the longest procedure length.
Three patients (38%) had pathways located deep in the septal area
requiring bi-atrial applications. Two patients (25%) presented with a
diverticulum of the coronary sinus (Figure 4). The cause
leading to recurrence in these cases was probable multiple including
lack of lesion depth, epicardial location and poor delivery of energy
when lesions were located within the coronary sinus.