CTICasesDisplaced FORMA Tricuspid Valve Spacer Device
Imaging findings
Chest CT demonstrates a massively dilated right atrium and right ventricle. A specialized tricuspid spacer device (Edwards FORMA) is visible, consisting of a thick, well-defined, radiopaque balloon-like polymer spacer designed to traverse the tricuspid valve. However, the device is displaced and retracted, with its distal anchoring mechanism pulled back from its intended position at the right ventricular apex, and the spacer body sitting entirely within the right atrium instead of across the tricuspid valve annulus.
Key takeaways
The Edwards FORMA tricuspid spacer is a novel percutaneous device designed to treat severe tricuspid regurgitation by placing an inflatable polymer balloon across the tricuspid valve annulus to provide a surface for leaflet coaptation. A key mechanical complication of this device is displacement or migration, where the distal anchor at the right ventricular apex dislodges, allowing the spacer to retract into the right atrium, rendering the device ineffective and requiring surgical or percutaneous intervention.
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