Acute Hypoattenuating Leaflet Thickening after Percutaneous Pulmonary Valve Implantation: A Case Report

Yee-Tat Lee^1,2, Hay-Son Robin Chen³, Ka-Lam Calvin Leung^1,2, Chun-Ka Wong^1,2, Ho-On Alston Chiu^1,2, Chi-Wai Stephen Cheung⁴, Yuen-Hei Mak⁴, Ka-Chun Un^1,2,*
1 Cardiology Division, Department of Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
2 Cardiology Division, Department of Medicine, Queen Mary Hospital, Hong Kong, China
3 Cardiology Centre, Department of Paediatrics and Adolescent Medicine, Hong Kong Children’s Hospital, Hong Kong, China
4 Department of Radiology, Queen Mary Hospital, Hong Kong, China
* Corresponding Author: Ka-Chun Un. Email: email

Structural and Congenital Heart Disease https://doi.org/10.32604/schd.2026.078486

Received 31 December 2025; Accepted 05 June 2026; Published online 15 June 2026

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Abstract

Background: Hypoattenuating leaflet thickening (HALT) is a reported complication following percutaneous pulmonary valve implantation (PPVI) Case description: A 32-year-old man with a history of repaired Tetralogy of Fallot (TOF) underwent PPVI for symptomatic severe pulmonary regurgitation (PR). The postoperative course was complicated by HALT diagnosed by computed tomography (CT) within 24 h of the procedure. Anticoagulation therapy was administered, and reassessment CT at 4 months showed resolution of HALT. Conclusion: HALT following PPVI is managed with anticoagulation yet consensus for optimal management strategy is lacking.

Keywords

PPVI; HALT; HAM

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Acute Hypoattenuating Leaflet Thickening after Percutaneous Pulmonary Valve Implantation: A Case Report

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