Central illustration. Feasibility of redo-TAVI in self-expanding Evolut valves: a CT analysis from the Evolut Low Risk trial substudy.

The initial analysis was completed with the inflow of the S3 approximately aligned with the inflow of the Evolut, with additional analyses based on node levels 4, 5, and 6 of the Evolut frame. An Evolut-in-Evolut was analysed inflow-to-inflow. *S3-in-Evolut inflow-to-inflow is an approximation, and the node level was dependent on the size. It correlates with S3 outflow at node 4 for the 26 mm Evolut and S3 outflow at node 5 for the 29 mm and 34 mm Evolut valves. CT: computed tomography; S3: SAPIEN 3 valve; TAVI: transcathether aortic valve implantation