Heterotopic caval valve-in-valve procedure for prosthetic migration: two case reports.

Background: Heterotopic bicaval stenting or caval valve implantation (CAVI) either with non-dedicated balloon-expandable Sapien™ valves (Edwards Lifesciences) or with dedicated TricValve™ (Products + Features) has emerged as a safe and effective percutaneous treatment for high-risk patients with severe tricuspid regurgitation (TR). One technical difficulty of CAVI is the lack of native calcified structures to anchor the device, which may lead to paravalvular leak or migration. Cases summary: We describe two patients with severe TR and high surgical risk who underwent CAVI procedures, both of them complicated with device migration to the right atrium (one inferior vena cava device and one superior vena cava device). Both cases were treated with a caval valve-in-valve procedure, with good technical and clinical results. Discussion: With the recent development of several percutaneous interventions for high-risk patients with severe TR, the rate of some possible complications is not well established, and neither are the better managing strategies. Device embolization is a rare complication of transcatheter heart interventions but with potential catastrophic consequences. Less invasive strategies such as the valve-in-valve procedure may be preferable in order to avoid the exposure of these patients to complex heart surgeries with extracorporeal circulation.