Ascending aortic dissections are a surgical emergency ... then spontaneously reconnects to the aorta at the distal part of the dissection.

53 The details of the surgical approach to aneurysmal dilatation of the ascending aorta are dictated by the extent of the aneurysm. If the aneurysm extends into the arch, an 'open' distal ...

The device uses an active fixation mechanism with external barbs oriented in opposing directions and designed to engage the aortic wall to decrease the risk of proximal and distal migration.