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Could a thyroid hormone boost heart transplant success?

NCT ID NCT06428097

Disease control Sponsor: University of California, San Francisco Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Aug 13, 2026 · Last updated Aug 14, 2026 · Updated 1 time

Summary

This trial tests whether giving levothyroxine, a thyroid hormone, right after a heart transplant helps the new heart work better and reduces complications. Adults listed for heart transplant will be randomly assigned to receive levothyroxine or a placebo (saline) during the first hours after surgery. Researchers will measure how much blood pressure support patients need and whether they experience early graft dysfunction, comparing the two groups.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Levothyroxine, a thyroid hormone, given intravenously after heart transplant surgery
What this could lead to
If it works, this could improve recovery and survival after heart transplant by reducing the need for blood pressure support and lowering the risk of early graft dysfunction.
What could go wrong
This is an early-phase, single-center trial, so results may not apply broadly. Levothyroxine may not improve outcomes and could carry risks, especially in people with thyroid conditions.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

About 97 people

The number the study aims to enrol. It can still change while the study runs.

Started

Mar 2024

Expected to finish

Mar 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. Participants must be listed for heart transplantation 2. Age ≥18 years 3. Ability to understand and the willingness to sign a written informed consent document. Exclusion Criteria: 1. Patients with pre-existing thyroid related condition including hypothyroidism, hyperthyroidism and malignancy 2. Patients with a known allergy or intolerance to levothyroxine 3. Patients participating in another study evaluating an investigational drug within the past 30 days.

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Heart transplant failure Heart transplant infection

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • University of California, San Francisco

    RECRUITING

    San Francisco, California, 94143, United States

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