A randomized trial to compare atrial fibrillation ablation using a steerable vs. a non-steerable sheath

Area of Science:

• Cardiac Electrophysiology
• Minimally Invasive Cardiovascular Procedures

Background:

• Catheter positioning and stability are critical challenges in catheter ablation for atrial fibrillation (AF).
• Optimizing catheter manipulation is essential for improving procedural efficiency and outcomes in AF ablation.

Purpose of the Study:

• To prospectively evaluate whether the routine use of a steerable sheath impacts procedural outcomes in catheter ablation of atrial fibrillation.
• To compare the efficacy and efficiency of a steerable sheath versus a fixed-curve sheath in AF ablation procedures.

Main Methods:

• A prospective randomized study involving 56 AF patients comparing the Agilis NXT steerable sheath with a fixed-curve Mullins sheath.
• Procedures utilized a mapping system with CT integration for pulmonary vein (PV) isolation, with additional ablation if AF persisted.
• Key procedural metrics including time to trans-septal access, CT registration, PV isolation, and fluoroscopy times were recorded.

Main Results:

• No significant differences were observed in initial procedural times or overall fluoroscopy duration between the two sheath groups.
• A learning curve was identified for the steerable sheath; after accounting for this, CT registration and right PV isolation times were reduced.
• Acute, 3-month, and 6-month single-procedure success rates were comparable between the steerable and fixed-curve sheath groups.

Conclusions:

• The steerable sheath demonstrated potential to shorten specific procedural elements in AF ablation, particularly after operator experience was gained.
• While not improving overall success rates, the steerable sheath may benefit inexperienced operators, despite associated higher procedure costs.
• Procedural efficiency in AF ablation can be influenced by catheter technology, with a learning curve impacting initial performance.