fig1
![Left atrial appendage occlusion in patients with atrial fibrillation: focus on current evidence and commercially available devices](https://image.oaes.cc/017e1b57-a4f6-4793-a610-1d872f302825/4393.fig.1.jpg)
Figure 1. (A) The WATCHMAN and WATCHMAN FLX devices consist of a self-expandable nitinol cage covered by a membrane of polyethylene terephthalate (PTFE). (B) Heart tissue grows over the PTFE membrane guaranteeing device endothelialization and left atrial appendage (LAA) sealing. (C) The interatrial septum is crossed, and the device is released in the LAA.