Abstract
Objective: This study aims to evaluate the predictive ability of unipolar electrograms in identifying target sites for ablation of accessory pathways in the treatment of Wolff-Parkinson-White syndrome.
Results: From June 2023 to August 2024, 70 patients (48 males, 22 females, mean age 37 ± 15) diagnosed with Wolff-Parkinson-White syndrome underwent cardiac electrophysiological studies at the Vietnam National Heart Institute. Unipolar and bipolar electrograms were analyzed at successful and unsuccessful ablation sites. The results showed that unipolar electrogram parameters such as QS wave morphology, accessory pathway potential, and activation time were associated with successful ablation sites. Combining indices from both unipolar and bipolar electrograms can increase the accuracy in identifying target locations.
Conclusion: Unipolar electrogram parameters provide valuable information in identifying the location of accessory pathways in Wolff-Parkinson-White syndrome, with the potential to enhance ablation effectiveness and reduce procedure time