• Catheter ablation works by scarring or destroying tissue in your heart that triggers an abnormal heart rhythm.
• Catheter ablation uses a long flexible tube inserted through your artery or vein in your groin and guided to your heart to deliver energy in the form of heat or excessive cold.
• It is used to treat arrhythmias. 

Reference: Medtronic. (n.d.). What Is It? - Catheter Ablation for Atrial Fibrillation. Retrieved from https://www.medtronic.com/us-en/patients/treatments-therapies/catheter-ablation-for-atrial-fibrillation/about-the-therapy/what-is-it.html