Rediscovered and Unforgotten: Transcatheter Interventions for the Treatment of Severe Tricuspid Valve Regurgitation.

Tricuspid valve regurgitation is both globally prevalent and undertreated. Historically, surgical intervention for isolated tricuspid regurgitation (TR) was avoided despite the prevalence of TR, largely due to poor surgical outcomes and an incomplete understanding of how it independently affects mortality. Over the past two decades, TR has been shown by several studies to be an independent predictor of worse functional status and poor survival on long-term follow-up. During this same time period, transcatheter interventions for the treatment of valvular heart disease have evolved dramatically. While the transcatheter repair and replacement of the tricuspid valve in patients with severe TR remains in the early stages of investigation relative to the mitral or aortic valve, the field is rapidly expanding. Here, the authors review the field of transcatheter tricuspid valve interventions for severe TR, focusing on the orthotropic devices and valves currently available worldwide.