Parametric Cardiac 18F-flutemetamol PET Imaging in ATTR Cardiomyopathy

NCT ID: NCT05374564

Last Updated: 2025-08-03

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE1

Total Enrollment

12 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-08-16

Study Completion Date

2024-11-14

Brief Summary

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18F-Flutemetamol (Vizamyl) is a radioactive diagnostic agent indicated and FDA-approved for Positron Emission Tomography (PET) imaging of the brain to estimate β-amyloid neuritic plaque density in adult patients with cognitive impairment who are being evaluated for Alzheimer's disease (AD) or other causes of cognitive decline. This study is designed to evaluate a novel use for 18F-Flutemetamol in cardiac amyloidosis.

Detailed Description

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The goal of this project is to perform a proof-of-concept study to compare the ability of quantitative parametric cardiac 18F-flutemetamol positron emission tomography (PET) to assess baseline and change in disease burden after six months of therapy with tafamidis treatment in 12 patients diagnosed with transthyretin cardiac amyloidosis (ATTR-CA) at Yale-New Haven Hospital. The primary outcome of the study will be comparisons in the magnitude of change in regional and global 18F-flutemetamol cardiac PET metrics between the baseline and six-month 18F-flutemetamol PET scans versus clinical stage and echocardiographic features (wall thickness, strain, LVEF).

Conditions

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Cardiomyopathies, Primary

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

The proposed study will be a single-arm open-label longitudinal study of 18F-flutemetamol cardiac imaging before/after six months of tafamidis treatment in 12 patients with treatment naïve ATTR cardiac amyloidosis.
Primary Study Purpose

DIAGNOSTIC

Blinding Strategy

NONE

Study Groups

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18F-flutemetamol

All clinical trial subjects will receive 18F-flutemetamol

Group Type EXPERIMENTAL

(18F)Flutemetamol

Intervention Type DRUG

18F-Flutemetamol binds to β-amyloid plaques and the F-18 isotope produces a positron signal that is detected by a PET scanner. Multiple recent studies have shown that thioflavin-analogue tracers such as 18F-flutemetamol may be able to fulfill the unmet need of elucidating the presence of amyloid deposition in the heart. Because it binds to the beta-pleated motif of the amyloid fibril due to their similarity to the thioflavin structure, 18F-Flutemetamol could potentially be used to image cardiac amyloidosis (CA)

Interventions

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(18F)Flutemetamol

18F-Flutemetamol binds to β-amyloid plaques and the F-18 isotope produces a positron signal that is detected by a PET scanner. Multiple recent studies have shown that thioflavin-analogue tracers such as 18F-flutemetamol may be able to fulfill the unmet need of elucidating the presence of amyloid deposition in the heart. Because it binds to the beta-pleated motif of the amyloid fibril due to their similarity to the thioflavin structure, 18F-Flutemetamol could potentially be used to image cardiac amyloidosis (CA)

Intervention Type DRUG

Other Intervention Names

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Vizamyl

Eligibility Criteria

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Inclusion Criteria

* 1\. Age \> 18 years
* 2\. Diagnosis of ATTR cardiac amyloidosis (wild-type or V142I ATTR mutation)

a. Diagnosis of ATTR cardiac amyloidosis by established consensus diagnostic criteria of Gillmore et al. (either invasive or non-invasive diagnostic pathways)
* 3\. Plan for initiation of tafamidis therapy for clinical indications and agree to continue tafamidis during the duration of the study.
* 4\. Stated willingness to comply with all study procedures and availability for the duration of the study
* 5\. Able to understand and sign the informed consent document after the nature of the study has been fully explained.
* 6\. Women of childbearing potential who are sexually active with a non-sterilized male partner and males who are sexually active with a partner of childbearing potential must agree to use adequate contraception from screening until 30 days after the Flutemetamol.

Exclusion Criteria

* 1\. Primary amyloidosis (AL) or secondary amyloidosis (AA).
* 2\. Prior liver or heart transplantation.
* 3\. Active malignancy or non-amyloid disease with an expected survival of less than 1 year
* 4\. Inability to lie flat for 60 minutes in the PET scanner
* 5\. History of prior treatment for ATTR cardiomyopathy and/or amyloid neuropathy, or decline clinical tafamidis treatment.
* 6\. Pregnancy or lactation
* 7\. Known allergic reactions to components of the 18F-flutemetamol and/or polysorbate 80
* 8\. High risk for non-adherence as determined by screening evaluation.
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Pfizer

INDUSTRY

Sponsor Role collaborator

Yale University

OTHER

Sponsor Role lead

Responsible Party

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Edward J Miller

MD, PhD, Associate Professor of Medicine

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Edward J Miller, MD

Role: PRINCIPAL_INVESTIGATOR

Yale University

Locations

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Yale University

New Haven, Connecticut, United States

Site Status

Countries

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United States

References

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Other Identifiers

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2000031407

Identifier Type: -

Identifier Source: org_study_id

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