Clinical outcomes
Clinical follow-up was performed in 53 patients, and antiarrhythmic drugs were prescribed in 11 patients at the final follow-up. Forty-one patients (77.4%) were free from atrial arrhythmia during the median 369 (311–412) days of follow-up. Both serum BNP level (170.0 ± 127.0 pg/ml before ablation vs. 50.0 ± 54.8 pg/ml after ablation, p<0.01) and LA diameter (45.0 ± 6.4 mm before ablation vs. 42.9 ± 7.5 mm after ablation, p<0.01) decreased significantly after ablation. The A-wave velocity measured by TTE after ablation was 0.54 ± 0.13 cm/s.