ECG Data during Follow-up
In all 20 patients, no serious complications occurred. Four patients
developed a bundle-branch block pattern on surface ECG (2 LBBB, 3 RBBB)
within the first three days after the procedure. Two recovered at the
six-month follow-up (1 LBBB and 2 RBBB). The duration of the QRS
increased significantly from 97.6 ± 16.5 ms to 109.3 ± 17.4 ms (before
ablation vs. six months follow up, p = 0.003).