Characterization of RadiOlabeled Tracer Uptake Pattern in Noninfected

Status Active, not recruiting

Clinical Trial Summary

Therefore, the objective of the study is to characterize the pattern of radiolabeled tracer (18F-FDG) uptake in noninfected transcatheter heart valves in early follow-up after transcatheter aortic valve replacement (TAVR).

Clinical Trial Description

Diagnostic accuracy of Infective endocarditis (IE) is commonly challenging. Current clinical guidelines recommend the use of the modified Duke criteria, based on clinical, echocardiographic and biological findings, as well as the results of blood cultures and serologies. Advances in imaging techniques have resulted in an improvement in the identification of endocardial involvements and extracardiac complications of IE. Thus, recent works have demonstrated that 18F-FDG PET/CT and radiolabeled leucocyte SPECT/CT may improve the detection of silent endocardial lesions. The sites of radiotracer accumulation show regions of a high metabolic activity due to an inflammation or infection process. It is well known that, in surgical prosthetic valves, a mild radiotracer uptake in the perivalvular area may occur in the absence of infection and could therefore be considered as a normal pattern, particularly early after valve replacement. However, evidence of this phenomenon is lacking regarding transcatheter heart valves and the factors used to distinguish between normal and abnormal patterns of radiolabeled tracer are not standardized. The hypothesis is that patients undergoing transcatheter aortic valve replacement (TAVR) show a radiolabeled tracer (18F-FDG) uptake around the prosthesis despite the absence of IE. Moreover, the uptake pattern might vary between different platforms. Therefore, the objective of the study is to characterize the pattern of radiolabeled tracer uptake in noninfected transcatheter heart valves in early follow-up after TAVR. This will be a pilot study including 30 patients after TAVR procedure. ;

Study Design

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT03683355
Study type	Observational
Source	Institut universitaire de cardiologie et de pneumologie de Québec, University Laval
Contact
Status	Active, not recruiting
Phase
Start date	November 9, 2018
Completion date	March 1, 2024

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See also
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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Characterization of RadiOlabeled Tracer Uptake Pattern in Noninfected Transcatheter Aortic Valves. — COUNT

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms