Procedural characteristics
The mean procedural time was 172 + 83 minutes. The mean time
taken from the initiation of radiofrequency energy application to block
in AP conduction was 4.96 + 2.98 seconds (Table 1).
Adenosine administration at 10 minutes was positive in 3 cases (2.7%),
negative in 99 cases (90%), and indeterminate in 8 cases (7.3%).
(Central illustration)
Reconnection of the accessory pathway at 30 minutes post-ablation was
seen in 8 patients (7.3%). Of these, adenosine at 10 minutes showed
positive results (evidence of intermittent pathway conduction) in 3
patients. (Table 2) In the other 5 patients, the adenosine test at 10
minutes was negative (no pathway conduction). Thus, adenosine test at 10
minutes has a sensitivity, specificity, positive predictive value, and
negative predictive value of 37.5%, 100%, 100%, and 94.9% in
identifying the recurrence of accessory pathway conduction at 30
minutes, respectively (Central illustration). In 8 patients who had
accessory pathway reconnection at 30 minutes, pathway location was left
lateral in 5 patients, CS in 2, and midseptal in 1 patient (Table 3). Of
these 8 patients, 6 had bidirectional conduction, antegrade only
conduction in 1 patient, and concealed conduction in 1 patient.