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Updated: Jun 8, 2026
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Four-Dimensional Computed Tomography-Guided Valve Sizing for Transcatheter Pulmonary Valve Replacement
Published on: January 20, 2022
Valve Oversizing and Geometric Factors in Structural Valve Deterioration After Pulmonary Valve Replacement.
Yosuke Kugo1, Takashi Kido1, Motoki Komori1
1Department of Cardiovascular Surgery, The University of Osaka Graduate School of Medicine, Osaka, Japan.
The Annals of Thoracic Surgery
|June 6, 2026
Summary
Prosthetic valve angulation, not just size, impacts durability after pulmonary valve replacement. Specific valve-outflow tract geometry is linked to structural valve deterioration in patients with congenital heart disease.
Area of Science:
- Cardiology
- Biomedical Engineering
- Medical Imaging
Background:
- Valve oversizing is linked to structural valve deterioration (SVD) post-pulmonary valve replacement (PVR).
- The exact mechanism driving SVD remains unclear.
- Geometric relationships may play a role in SVD.
Purpose of the Study:
- To investigate if the geometry between implanted prosthetic valves and the right ventricular outflow tract (RVOT) contributes to SVD.
- To determine the influence of valve-outflow tract geometry on prosthetic valve durability.
Main Methods:
- Retrospective analysis of patients with congenital heart disease undergoing PVR with bioprosthetic valves.
- Postoperative computed tomography (CT) used to quantify four geometric parameters.
- Valve oversizing indexed to body surface area; SVD defined by moderate/greater pulmonary regurgitation or stenosis.
Main Results:
- Eighty-two patients analyzed; 5- and 10-year freedom from SVD was 84% and 65%, respectively.
- Posterior angulation of the implanted valve independently predicted SVD (aHR 83.5).
- Posterior angulation correlated with valve oversizing and a cutoff of 0.27 optimized risk discrimination.
Conclusions:
- Prosthetic valve angulation relative to the RVOT is associated with SVD.
- Valve-outflow tract geometry, specifically angulation, is closely related to valve oversizing.
- Valve durability may depend more on valve-outflow tract geometry than valve size alone.
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