Self-Expanding Transcatheter Aortic Valve-Frame Infolding: A Case Series With a Warning Message.

Nitinol frames of self-expanding transcatheter heart valves (THVs) are prone to mechanical dysfunction and deformation, which can lead to frame fracture, infolding, and underexpansion. Infolding of the frame can result in severe paravalvular leak (PVL) and hemodynamic compromise ([1][1]). The