Related Experiment Video
Updated: Feb 8, 2026

Standardized Technique of Aortic Valve Re-implantation for Valve-sparing Aortic Root Replacement
Published on: December 11, 2017
Imaging Evaluation for the Detection of Leaflet Thrombosis After Transcatheter Aortic Valve Replacement
Zhen-Gang Zhao1, Mo-Yang Wang1, Hasan Jilaihawi1
1Heart Valve Center, New York University Langone Health, 530 1st Avenue, Suite 9V, New York, NY 10016, USA.
Abstract:
Subclinical leaflet thrombosis has been increasingly recognized as a common imaging finding after surgical or transcatheter aortic valve replacement (TAVR) in recent studies. This finding has raised concerns over TAVR valve durability and debates on optimal postprocedural antithrombotic regime. Hypoattenuated leaflet thickening (HALT) and the associated reduced leaflet motion (RELM) were noted as computed tomography hallmarks of the phenomenon. The coexistence of HALT and significant RELM has been suggested as a threshold for reporting of subclinical leaflet thrombosis. This methodology may contribute to the standardization of reporting for research collaboration, hence the better understanding and management of this common yet largely unknown phenomenon.
Related Concept Videos
Venous Thrombosis I: Introduction
Heart Valves
The AV valves prevent the backflow of blood from the ventricles to the atria during ventricular contraction. These valves function with the assistance of the chordae tendineae and papillary muscles. When the ventricles are relaxed, the chordae tendineae are slack, allowing blood to flow from the atria into the...
Continuous Renal Replacement Therapy
Mitral Valve Prolapse I: Introduction
Venous Thrombosis III: Interprofessional Care
Venous Thrombosis IV: Nursing Management

