Radiofrequency Ablation is a procedure that corrects irregular heartbeats (arrhythmias) by destroying small amounts of tissue that cause the arrhythmia. During this procedure, a catheter is threaded into the heart. The tip of the catheter is guided to the area of heart tissue that is causing the arrhythmia. Then the catheter emits a pulse of painless radiofrequency energy that destroys the abnormal tissue and corrects the irregular heartbeat.