Optimizing Pulsed Field Ablation: Results From a 1,000-Patient Cohort

Area of Science:

• Cardiology
• Electrophysiology
• Medical Technology

Background:

• Pulsed field ablation (PFA) is a nonthermal technology for pulmonary vein isolation (PVI) in atrial fibrillation (AF).
• Progressive refinement of PFA procedural workflow enhances safety, PVI durability, and long-term outcomes.
• The study transitioned from an 8-application to a 10-application

Purpose of the Study:

• Evaluate procedural characteristics and long-term outcomes of PFA for PVI.
• Assess the impact of sequential workflow refinements on PFA efficacy and safety.
• Determine the durability of PVI achieved with PFA.

Main Methods:

• Single-center study of consecutive AF patients undergoing PVI with a pentaspline PFA catheter (April 2021-May 2024).
• Exclusion of ablations beyond PVI.
• Collection and analysis of procedural data and follow-up outcomes.

Main Results:

• 1,000 patients included; PVI achieved in all with a median procedure time of 30 minutes.
• Major complication rate was 0.5% (overall 2.1%); 1-year arrhythmia-free survival was 76.6%.
• Workflow refinements improved safety (reduced tamponades and bradycardia) and increased PVI durability (78.7% to 91.6% with the olive strategy).

Conclusions:

• PFA demonstrates high efficacy, short procedure times, and low complication rates for AF ablation.
• Workflow refinements significantly enhance PVI durability and procedural safety.
• PFA is a standardized and safe option for AF ablation.