Cath Lab (IMAGE) Intermountain Medical Center Caption Ablation procedures restore a regular heartbeat in patients who have a dangerous, abnormal heart rhythm called atrial fibrillation. But it doesn't always work. Now, a new study suggests that certain molecules are associated with the recurrence of erratic heartbeats in some patients after ablation therapy. Credit Intermountain Medical Center Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.