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Assessment of Osteoblastic Activity With 18F-Fluoride in Aortic Bioprosthesis Structural Valve Dysfunction (SVD)

2017-01-11 03:38:21 | BioPortfolio

Summary

Structural valve dysfunction (SVD) is the most common and life threatening complication in patients treated by aortic valve replacement. A calcification process is frequently involved in SVD but its pathophysiology remains unclear. In the hypothesis of an active metabolic phenomenon of calcification, as previously shown in native aortic valve stenosis, rather than a passive deposit of calcium in valve tissue, positon emission tomography (PET) imaging with 18F-Fluoride could emphasize increased osteoblastic activity in SVD tissue.

This study will include patients with echocardiography-confirmed SVD. Echocardiographic parameters and other current parameters analyzed in SVD patients such as bioprosthesis calcium scoring derived from CT will be compared to 18F-Fluoride activity.

Study Design

Intervention Model: Single Group Assignment, Masking: Open Label

Conditions

Aortic Bioprosthesis Structural Valve Dysfunction

Intervention

18F-Fluoride PET-CT ; CT calcium scoring ; 18F-FDG PET-CT

Location

Nantes University Hospital
Nantes
France

Status

Not yet recruiting

Source

Nantes University Hospital

Results (where available)

View Results

Links

Published on BioPortfolio: 2017-01-11T03:38:21-0500

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Medical and Biotech [MESH] Definitions

The downward displacement of the cuspal or pointed end of the trileaflet AORTIC VALVE causing misalignment of the cusps. Severe valve distortion can cause leakage and allow the backflow of blood from the ASCENDING AORTA back into the LEFT VENTRICLE, leading to aortic regurgitation.

Calcium fluoride. Occurring in nature as the mineral fluorite or fluorspar. It is the primary source of fluorine and its compounds. Pure calcium fluoride is used as a catalyst in dehydration and dehydrogenation and is used to fluoridate drinking water. (From Merck Index, 11th ed)

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Pathological condition characterized by the backflow of blood from the ASCENDING AORTA back into the LEFT VENTRICLE, leading to regurgitation. It is caused by diseases of the AORTIC VALVE or its surrounding tissue (aortic root).

A type of constriction that is caused by the presence of a fibrous ring (discrete type) below the AORTIC VALVE, anywhere between the aortic valve and the MITRAL VALVE. It is characterized by restricted outflow from the LEFT VENTRICLE into the AORTA.

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