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Subclinical Leaflet Thrombosis — EECC MCQ

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HardValvular Heart DiseaseSubclinical Leaflet ThrombosisEECC

A patient with a bioprosthetic aortic valve develops a new rise in transvalvular gradient. Four-dimensional CT shows hypoattenuated leaflet thickening and reduced leaflet motion without calcification. What is the most likely diagnosis?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: C — Bioprosthetic leaflet thrombosis

Hypoattenuated leaflet thickening with reduced motion is the characteristic CT phenotype of bioprosthetic leaflet thrombosis. Structural degeneration usually produces calcification or tearing, pannus is a fibrous peri-annular process, and patient–prosthesis mismatch is present from implantation rather than newly progressive.

Reference: https://www.escardio.org/Guidelines/Clinical-Practice-Guidelines