{"id":"1e7f9c95d42e","type":"article","url":"https://hartvaat.nl/2026/10/01/halt-na-tavr-pathofysiologie-klinische-implicaties-en-impact-op-klepduurzaamheid/","title":"HALT na TAVR: pathofysiologie, klinische implicaties en impact op klepduurzaamheid","title_en":"Hypoattenuated Leaflet Thickening: Pathophysiology, Clinical Implications, and Its Role in Structural Valve Longevity.","category":"algemeen","category_label":"Algemeen","professions":["cardioloog"],"tags":[],"journal":"Interventional cardiology clinics","doi":"10.1016/j.iccl.2026.06.004","source_url":"https://doi.org/10.1016/j.iccl.2026.06.004","authors":["Luai Madanat","Ahmad Jabri","Pedro A Villablanca"],"significance":5,"published":"2026-09-05","source_date":"2026-10-01","image":"","kennis":["https://hartvaat.nl/kennis/kleplijden/aortastenose/","https://hartvaat.nl/kennis/kleplijden/kleppathologie-reumatische-origine/"],"congress":"","summary_en":"This review examines hypoattenuated leaflet thickening (HALT), a frequent subclinical CT finding after TAVR characterized by low-attenuation thickening of bioprosthetic leaflets. Although typically asymptomatic, HALT is increasingly recognized as part of the leaflet thrombosis spectrum and may progress to clinically significant valve dysfunction. Understanding its pathophysiology and imaging features is relevant for long-term patient follow-up and structural valve management.","created":"2026-08-29T01:09:14Z","updated":"2026-08-29T01:09:14Z","licence":"Citeer vrij, met bronvermelding en een link naar hartvaat.nl (de url van het record). Samenvattingen zijn redactioneel werk van HartVaat; de oorspronkelijke publicaties blijven van hun uitgevers (doi). Geen medisch advies.","body_markdown":"Dit overzicht beschrijft hypoattenuated leaflet thickening (HALT), een veelvoorkomend subklinisch CT-beeld na TAVR dat gekenmerkt wordt door verdikking van de klepblaadjes. Hoewel vaak asymptomatisch, wordt HALT steeds vaker gezien als onderdeel van het klepthrombosesspectrum dat kan progresseren naar klinische klepdysfunctie. Inzicht in de pathofysiologie en beeldvorming is relevant voor de follow-up en het management van patiënten met bioprothetische kleppen.","abstract_original":"The expansion of transcatheter aortic valve replacement (TAVR) into younger and lower-risk populations has heightened attention toward long-term valve durability. Hypoattenuated leaflet thickening (HALT), a subclinical imaging finding identified on multidetector computed tomography, has emerged as a relatively common occurrence following TAVR. It is characterized by low-attenuation, often meniscal-shaped thickening of bioprosthetic valve leaflets and may be present with or without associated reduced leaflet motion. Although frequently asymptomatic, HALT is increasingly recognized as part of a broader spectrum of leaflet thrombosis that may progress to clinically significant valve dysfunction."}