 And more news in 60 seconds. Atrial fibrillation, or AFib, is the most common type of arrhythmia. And although the condition alone is not life-threatening, it can increase your risk of stroke and heart failure if not treated. Dr. Athanasios Tamiris, a cardiac electrophysiologist with MedStar Health, says pulsed field ablation is a new safer treatment for atrial fibrillation.