Retinal Fundus Imaging and OCT Imaging for Ocular Detection of ATTR-CM

August 24, 2026 updated by: AstraZeneca

A Multicenter Pilot Study to Investigate Ocular Involvement and the Potential of Ocular Imaging for Non-invasive Screening for Transthyretin Amyloid Cardiomyopathy (ATTR-CM)

This multicenter pilot study will enroll adult participants with a confirmed clinical diagnosis of transthyretin amyloid cardiomyopathy (ATTR-CM) and heart failure (HF) controls with documentation within the past 2 years that either excludes ATTR-CM or indicates a low probability of ATTR-CM. Ocular imaging and other study data will be collected to assess the feasibility of developing and preliminarily evaluating a machine learning model to discriminate ATTR-CM cases from HF controls without ATTR-CM.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Detailed Description

A participant who does not complete the study within 90 days from enrollment will be discontinued from the study. A participant may be discontinued from the study at any time at the discretion of the investigator for behavioral or compliance reasons. A participant may withdraw from the study at any time at the participant's own request for any reason (or without providing any reason) without any implication on participant's rights.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
500

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Germany
      • Berlin, Germany, 13353
        • Not yet recruiting
        • Research Site
      • Essen, Germany, 45147
        • Not yet recruiting
        • Research Site
      • Frankfurt am Main, Germany, 60596
        • Not yet recruiting
        • Research Site
      • Würzburg, Germany, 97078
        • Not yet recruiting
        • Research Site
  • Portugal
      • Guimarães, Portugal, 4835-044
        • Recruiting
        • Research Site
      • Lisbon, Portugal, 1169-024
        • Not yet recruiting
        • Research Site
      • Lisbon, Portugal, 1649-028
        • Not yet recruiting
        • Research Site
      • Lisbon, Portugal, 2799-523
        • Not yet recruiting
        • Research Site
  • Spain
      • L'Hospitalet de Llobregat, Spain, 08907
        • Not yet recruiting
        • Research Site
      • Madrid, Spain, 28040
        • Not yet recruiting
        • Research Site
      • Palma de Mallorca, Spain, 07198
        • Not yet recruiting
        • Research Site
  • Sweden
      • Gothenburg, Sweden, 413 45
        • Not yet recruiting
        • Research Site
      • Solna, Sweden, 171 64
        • Not yet recruiting
        • Research Site
      • Vasterbottens Lan, Sweden, 907 37
        • Not yet recruiting
        • Research Site
  • United States
    • California
      • Palo Alto, California, United States, 94305
        • Not yet recruiting
        • Research Site
    • Florida
      • Jacksonville, Florida, United States, 32224
        • Not yet recruiting
        • Research Site
    • Illinois
      • Chicago, Illinois, United States, 60611
        • Not yet recruiting
        • Research Site
    • Massachusetts
      • Boston, Massachusetts, United States, 02114
        • Not yet recruiting
        • Research Site
    • Oregon
      • Portland, Oregon, United States, 97239-3098
        • Not yet recruiting
        • Research Site
    • Tennessee
      • Germantown, Tennessee, United States, 38138
        • Not yet recruiting
        • Research Site

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

The study population will comprise adult participants with a confirmed clinical diagnosis of transthyretin amyloid cardiomyopathy (ATTR-CM) and heart failure (HF) controls who have documentation within the past 2 years that either excludes ATTR-CM or indicates a low probability of ATTR-CM.

Description

Inclusion Criteria:

  • 1. Participant must be 18 years and older at the time of signing the informed consent form.
  • 2. Participants with either of the following:
  • - Positive ATTR-CM cases: Participants with a clinical diagnosis of transthyretin amyloid cardiomyopathy (ATTR-CM) with amyloid deposits in cardiac or non-cardiac tissue confirmed by Congo Red (or equivalent) staining, or DPD-Tc, PYP-Tc, or HMDP-Tc scintigraphy with Grade 2 or 3 cardiac uptake in the absence of abnormal light chains ratio.
  • - Control population: Participants with a clinical diagnosis of guideline-directed medical therapy-directed heart failure (HF) and either:
  • a) Subgroup A: Definitively excluded ATTR-CM amyloidosis: negative cardiac or non-cardiac tissue biopsy for amyloid, or negative technetium scintigraphy within the past 2 years.
  • b) Subgroup B: Low probability of ATTR-CM amyloidosis, not definitively excluded: absence of amyloid-suggestive features on echocardiography (ECHO), electrocardiography (ECG), or cardiac magnetic resonance imaging (MRI) within the past 2 years, with documented clinical assessment indicating HF etiology unlikely attributable to amyloidosis; no amyloid-specific testing (technetium scintigraphy or biopsy) performed.
  • 3. Participant or legally authorized representative (LAR) must sign the informed consent form.

Exclusion Criteria:

  • 1. Any known eye condition that may preclude clear imaging of the retina.
  • 2. Any known history of amyloid light-chain (AL) amyloidosis.
  • 3. Any ocular surgery that, in the opinion of the investigator, makes participation in the study undesirable.
  • 4. Any medical condition that, in the opinion of the investigator, makes participation in the study undesirable, for example, if the participant is critically unwell or requires ongoing emergency treatment.
  • 5. Involvement in the planning and/or conduct of the study.
  • 6. In the opinion of the investigator, the participant is unlikely to comply with study procedures, restrictions, and requirements.
  • 7. Previous enrollment in the present study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
ATTR-CM
Participants with a confirmed clinical diagnosis of transthyretin amyloid cardiomyopathy (ATTR-CM).
HF Control
Participants with guideline-directed medical therapy-directed heart failure and documentation within the past 2 years that either excludes transthyretin amyloid cardiomyopathy (ATTR-CM) or indicates a low probability of ATTR-CM.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Comparison of per-participant confidence scores distributions between ATTR-CM cases and HF controls without ATTR-CM
Time Frame: At a single assessment time point within 90 days following informed consent form signing
Per-participant confidence score distributions generated by the machine learning (ML) model will be compared between participants with clinically confirmed transthyretin amyloid cardiomyopathy (ATTR-CM) and heart failure controls without ATTR-CM.
At a single assessment time point within 90 days following informed consent form signing
Qualitative assessment of features learned indicative of ATTR pathology
Time Frame: At a single assessment time point within 90 days following informed consent form signing
Features learned by the machine learning (ML) model that are indicative of transthyretin amyloid pathology will be qualitatively assessed.
At a single assessment time point within 90 days following informed consent form signing

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Sensitivity, specificity, and Area Under the Receiver Operating Characteristic Curve (AUROC) of the ML model to correctly identify ATTR-CM cases based on ocular imaging data
Time Frame: At a single assessment time point within 90 days following informed consent form signing
Sensitivity, specificity, and area under the receiver operating characteristic curve will be used to describe the performance of the machine learning model for distinguishing participants with clinically confirmed transthyretin amyloid cardiomyopathy (ATTR-CM) from heart failure controls without ATTR-CM based on ocular imaging data.
At a single assessment time point within 90 days following informed consent form signing
Descriptive comparison of score distributions across study population strata and demographics
Time Frame: At a single assessment time point within 90 days following informed consent form signing
Score distributions generated by the machine learning model will be descriptively compared across study population strata and demographic groups.
At a single assessment time point within 90 days following informed consent form signing

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
AstraZeneca

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 8, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 18, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 18, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 2, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 2, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 8, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
August 26, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 24, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
August 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • D8455R00001

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal Vivli.org. All requests will be evaluated as per the AZ disclosure commitment: https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.

Yes, indicates that AZ are accepting requests for IPD, but this does not mean all requests will be shared.

IPD Sharing Time Frame

AstraZeneca will meet or exceed data availability as per the commitments made to the EFPIA PhRMA Data Sharing Principles. For details of our timelines, please rerefer to our disclosure commitment at https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.

IPD Sharing Access Criteria

When a request has been approved AstraZeneca will provide access to the anonymized individual patient-level data via secure research environment Vivli.org. Signed Data Usage Agreement (non-negotiable contract for data accessors) must be in place before accessing requested information.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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