SentreHeart Inc. announced that it has received approval for an Investigational Device Exemption (IDE) from the U.S. Food and Drug Administration (FDA) to begin enrollment in a clinical study of the Lariat Suture Delivery Device. The randomized, controlled clinical study, known as the AMAZE Trial, will evaluate the use of the Lariat device for the ligation, or closure, of the left atrial appendage (LAA) as an adjunctive treatment to ablation in patients with persistent or longstanding persistent atrial fibrillation (AFib).