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Grape powder may keep heart rhythm steady after surgery

NCT ID NCT05991700

Prevention Sponsor: University of Michigan 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tests whether a concentrated grape powder, taken for three days before heart surgery, can prevent a common complication called post-operative atrial fibrillation (POAF). POAF is an irregular heartbeat thought to be triggered by inflammation after surgery. The trial will include 70 adults aged 50-79 undergoing mitral valve repair. Participants will either receive the grape powder or a placebo, and researchers will monitor heart rhythm and inflammation markers.

What this could mean

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

Active substance
Freeze-dried grape powder
What this could lead to
If it works, this could offer a simple, natural way to prevent a common heart surgery complication without risky side effects.
What could go wrong
This is an early Phase 1/2 trial with only 70 people, so results may not apply widely. The effect may be small or not work at all.

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 1/2

Runs two stages together: safety and dose first, then whether the treatment works.

Participants

About 70 people

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

Started

Mar 2026

Expected to finish

Aug 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 to 79 years

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: * Males and female patients (age 50-79) at the Mitral Valve Clinic/CVC undergoing elective cardiac surgery for mitral valve repair without the Cox MAZE procedure (MVR patients also undergoing CABG and/or tricuspid valve repair are also eligible) * In sinus rhythm (no pre-operative atrial fibrillation) Exclusion Criteria: * Age ≥ 80 years * Diagnosed pre-operative chronic or paroxysmal AF * Prior ablation procedure for AF * Previous cardiac surgery * Implanted pacemaker * Active smoker * Comorbidities such as congenital or cardiac re-operation * Use of antiarrhythmic agents * Active inflammatory or infectious disease or malignancy * Diagnosed autoimmune disease * Corticosteroid or other immunomodulatory or immunosuppressive medication * Risk factors for POAF including low ejection fraction (EF) (EF\<50%), left atrial (LA) dilation (LA\>5.0 cm), and high degree of mitral regurgitation (grade 3-4).

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Conditions

The condition(s) this trial relates to.

atrial fibrillation prevention target

As listed by the trial registrant

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

Post-operative atrial fibrillation poaf

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 Michigan - Michigan Medicine

    RECRUITING

    Ann Arbor, Michigan, 48109, United States

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