Abstract: Objective To report the experience of using a steerable sheath (Agilis NxT sheath) during the pulmonary veins isolation for paroxysmal atrial fibrillation (AF) ablation.Methods Twenty-six patients with paroxysmal AF (PaAF,n=26) underwent mapping and ablation using Agilis NxT sheath.The procedures of left atrium geometry was created undergoing mapping by EnSite Velocity^TM v 3.0 after puncture of atrium septum and pulmonary veins angiography. Circumferential pulmonary veins isolation (CPVI) was performed using Agilis NxT sheath.Results Four PVIs were successfully performed in all 26 patients. The average operation time was (165.7±48.1) minutes, the average time of radiation was (9.4±0.5) seconds. The time of left atrial geometry modeling was (7.5±4.3) minutes, the time for left pulmonary vein isolation was (55±17) minutes, and the time for right pulmonary vein isolation was (37±11) minutes, respectively.Cardiac tamponade occurred in 1 cases, which was cured after pericardial puncture. Follow-up for 6-12 months showed that in 3 cases (11.5%) the AF recurred. Conclusion A steerable sheath is effective and safe during CPVI for AF ablation.

Key words: atrial fibrillation, radiofrequency ablation, steerable sheath