Hypoattenuated leaflet thickening
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Hypoattenuated leaflet thickening (HALT), or subclinical leaflet is a sign seen on cardiac CT in the setting of valvular thrombosis, is of prosthetic heart valves.
It is a focal area of hypoattenuating leaflet thickening seen in transcatheter aortic valve prostheses whichthat begins at the leaflet insertion on the valve frame seen on CT.
HALT is a known complicationand in the setting of surgical or transcatheter aortic valve replacement (TAVR). There is concern that, it may compromise valvular durability and increasecan be assessed in the risk of thromboembolism, stroke, or transient ischemic attacksdiastolic phase after leaflet caption has been visualised 1-3.
-<p><strong>Hypoattenuated leaflet thickening</strong> (HALT), or subclinical leaflet thrombosis, is a focal area of hypoattenuating leaflet thickening seen in transcatheter aortic valve prostheses which begins at the leaflet insertion on the valve frame seen on CT. </p><p>HALT is a known complication of transcatheter aortic valve replacement (TAVR). There is concern that it may compromise valvular durability and increase the risk of thromboembolism, stroke, or transient ischemic attacks.</p>- +<p><strong>Hypoattenuated leaflet thickening (HALT)</strong> is a sign seen on <a href="/articles/cardiac-ct-1">cardiac CT</a> in the setting of <a href="/articles/prosthetic-valve-thrombosis">valvular thrombosis</a> of <a href="/articles/prosthetic-heart-valve">prosthetic heart valves</a>.</p><p>It is a focal area of hypoattenuating leaflet thickening that begins at the leaflet insertion on the valve frame and in the setting of surgical or <a href="/articles/transcatheter-aortic-valve-implantation-tavi-2">transcatheter aortic valve replacement (TAVR)</a>, it can be assessed in the diastolic phase after leaflet caption has been visualised <sup>1-</sup><sup>3</sup>.</p>
References changed:
- 3. Jilaihawi H, Asch F, Manasse E et al. Systematic CT Methodology for the Evaluation of Subclinical Leaflet Thrombosis. JACC Cardiovasc Imaging. 2017;10(4):461-70. <a href="https://doi.org/10.1016/j.jcmg.2017.02.005">doi:10.1016/j.jcmg.2017.02.005</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/28385256">Pubmed</a>
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- Signs