Figure 7.

Factors for leak generation following percutaneous left atrial appendage closure. Patient factors such as length of atrial fibrillation or ostial anatomy, device characteristics such as deformability, and implantation technique (coaxial device implantation, oversizing) play an important role in leak generation. Special care for device selection should be taken in complex anatomies, i.e. disc-type device for oval ostium in stiff left atrial appendage (red circle) or ball-type device for irregular ostial plane (red line).