부산대학교 도서관

The goal of pulmonary vein ablation for atrial fibrillation (AF) is returning to normal sinus rhythm; nevertheless it success is limited in part by uncertainly in the mechanisms that sustain AF. 43 AF patients were submitted to an ablation procedure and monitored after ablation. Dominant frequency from intra-atrial recordings obtained before the intervention were analysed in order to predict AF recurrence. The novelty of this study is that dominant frequency was calculated from reconstructed signal by singular spectrum analysis (SSA) application. Patients that maintained sinus rhythm and patients with recurrence in AF showed differences in left atrium dominant frequencies, with higher values in the recurrent AF group than in group without recurrence in the arrhythmia (p=0.02). Moreover, differences between both atria were found in the non-recurrent group, with 5.76 ± 1.31 Hz in the left atrium vs. 6.25±1.23 Hz in the right atrium (p=0.03). These findings show the potential of SSA as a preprocessing method and results are congruent with previous studies.