New hope for millions with unexplained chest pain: study targets tiny heart vessels
NCT ID NCT07533747
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study is for people who have chest pain and shortness of breath but no blockages in their main heart arteries. The likely cause is a problem with the heart's tiny blood vessels, called coronary microvascular dysfunction (CMD). The study will test treatments tailored to how each person's heart uses energy, aiming to reduce symptoms and improve quality of life. About 100 adults with CMD will participate.
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
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Phase 3
Large-scale testing in a bigger group. Usually the last step before a treatment can be approved.
- Participants
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About 100 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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May 2026
An estimate. Start dates often move.
- Expected to finish
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May 2031
An estimate. End dates often move.
- Lead sponsor
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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
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18 years and older
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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: * Angina with non-obstructive coronary arteries Exclusion Criteria: * Significant epicardial coronary stenoses * Inability to carry out bike exercise * Contra-indication to adenosine administration * Insulin usage with frequent hypoglycaemic episodes
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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.
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Can a Plant-Based diet restore blood flow in the Heart's small vessels?
- Can tiny heart vessel damage predict heart failure?
- Could High-Intensity workouts and diet tame chest pain from tiny heart vessels?
- Can an Hourglass-Shaped device relieve chest pain when arteries Aren't blocked?
- Microplastics in your blood: a hidden heart risk?
- Can a diabetes drug unclog the Heart's tiny vessels?