Thrombus-Induced Prosthetic Valve Dysfunction Demonstrating Hypo-Attenuated Leaflet Thickening: A Case Report.

Hypo-attenuated leaflet thickening (HALT) is an important and potentially underrecognized cause of late bioprosthetic valve dysfunction after surgical AVR. Multimodal imaging, including echocardiography and electrocardiogram-gated computed tomography, is essential for diagnosis, and timely surgical or medical intervention can effectively restore valve function and improve clinical outcomes.