Large Field-of-View Intravascular Ultrasound for Mitral and Tricuspid Valve-in-Valve Guidance: A Pilot Study.

This pilot study is the first to report the feasibility of a large field-of-view IVUS for periprocedural measurement of actual THV expansion when deployed valve-in-valve. Minimal inner THV stent frame dimensions correlate with increased postprocedural transvalvular gradients.