Ra Medical Systems Inc. announced that its new LockeT device, used as a suture retention device for percutaneous closures, has now been utilized in structural heart procedures. The latest use was in six patients undergoing Watchman & Amulet procedures, where the left atrial appendage is closed off in patients with atrial fibrillation, and two patients receiving the AVEIR Leadless Pacemaker at HCA Trident Medical Center in North Charleston, South Carolina.