What characteristic of a catheter aids in stability during LAAO delivery systems?

The pigtail shape of a catheter is specifically designed to enhance stability during Left Atrial Appendage Occlusion (LAAO) procedures. This shape allows the catheter to have an engaging anchor point within the anatomical structure, which helps maintain its position while the occlusion device is deployed. The curvature of the pigtail assists in conforming to the complex geometry of the left atrium and left atrial appendage, providing better control and minimizing the risk of dislodgement during the procedure.

In contrast, while other catheter characteristics like a curved tip design can offer benefits in navigation, they do not necessarily provide the same level of stability as the pigtail shape for LAAO applications. A single lumen structure might simplify the device but does not inherently enhance stability. Variable stiffness can contribute to adaptability but may not provide the anchor-like stability that a pigtail shape affords in the specific context of LAAO procedures.