Ablation of ventricular tachyarrhythmias located in the pulmonary artery

Abstract

To evaluate the efficacy and safety of ablation of ventricular tachyarrhythmias located in the pulmonary artery (PA), the data on 248 consecutive patients with ventricular tachycardia (VT) or premature ventricular contraction (PVC) of the right ventricle (RV) were analyzed over a period from February 2008 to March 2013. Localization of PVC/VT from LA was observed in 16 (6.5%) patients. The primary endpoint of the study was the absence of PVC/VT during long-term follow-up after a single and multiple ablation procedures. The secondary endpoints were surgery complications, the number of PVCs obtained by Holter monitoring during follow-up. The follow-up was 42.5±6.4 months. The longterm effectiveness of ablation of PVCs/VT from LA after one or more ablation procedures without the use of AAD was 93.8% and 100 % respectively. There were no postoperative complications in this group of patients. Neither cases of injury to the valve or wall of the pulmonary artery, nor spasms of the coronary arteries or other injuries were recorded. Average number of PVCs obtained by 24-hour Holter monitoring was 784±642 (range from 2 to 4000) as compared to 18371±12282 prior to surgery (p<0.001). In patients with ventricular tachyarrhythmias localized in the region of the pulmonary valve, radiofrequency ablation is a highly effective and safe treatment in the long-term follow-up.