Safety and Performance of a Pulsed Field Device for Global Mapping and Ablation of the Left Atrium for the Treatment of Atrial Fibrillation

This study is evaluating a new device that uses pulsed field energy (not heat or cold, but brief electric pulses) to map and treat the heart in people with atrial fibrillation (AF) — an irregular heartbeat. The goal is to assess how safe and effective this new approach is. **You may be eligible if...** - You are 18–75 years old - You have a confirmed diagnosis of atrial fibrillation (within the last 12 months) - You are scheduled for a catheter ablation procedure to treat AF - You may have had one previous ablation (cryoablation, radiofrequency, or pulsed field) **You may NOT be eligible if...** - You have had multiple previous ablations in the heart's upper chambers - You are awaiting or have received a heart transplant - You have had a stroke or serious blood clot - You have moderate-to-severe heart failure (NYHA class III or IV) - You have a serious bleeding disorder or serious heart valve problems - You had a heart attack in the last 3 months - You have a device or implant that could interfere with the procedure (e.g., a device closing a hole in the heart) Talk to your doctor to see if this trial is right for you.