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Could a simple nitrate boost help solve the mystery of chest pain?

NCT ID NCT06896903

Diagnosis Sponsor: Baylor Research Institute 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at whether giving a nitrate drug during a heart test can better detect blood flow problems in people who have chest pain but no blocked arteries. About 50 adults will get the standard test, then a repeat test after nitrates. The goal is to see if nitrates improve the accuracy of diagnosing microvascular angina.

What this could mean

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

Active substance
intracoronary nitroglycerine (nitrate)
What this could lead to
If successful, this could make coronary reactivity testing more accurate for diagnosing microvascular angina, helping doctors better identify the cause of chest pain.
What could go wrong
This is a small, early-phase diagnostic study with only 50 participants. The improvement from nitrates may be small or not clinically meaningful, and results may not apply to all patients.

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

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 50 people

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

Started

May 2025

Expected to finish

Jun 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. Aged 18 or older 2. Patient being evaluated for ANOCA or INOCA 3. Clinical suspicion for angina 4. Patient should be able to comply with the protocol. 5. Provide written informed consent before study participation. Exclusion Criteria: 1. Existing coronary artery disease 2. Previous percutaneous interventions within the coronaries 3. Current use (within 48 hours) of long-acting nitrate therapies 4. Current use (within 48 hours) of PDE-5 inhibitors (sildenafil, tadalafil) 5. Any other condition or co-morbidity which, in the opinion of the investigator or operator, may pose a significant hazard to the subject if he or she is enrolled in the study. 6. Children below 18 years, prisoners, pregnant people and patients who are unable to provide consent are excluded.

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Conditions

The condition(s) this trial relates to.

coronary microvascular disorder nonobstructive coronary artery disease

As listed by the trial registrant

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

Anoca - angina with non-obstructive coronary arteries Inoca (ischemia with non obstructive coronary artery disease)

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

  • Baylor Scott & White The Heart Hospital - Plano

    RECRUITING

    Plano, Texas, 75093, United States

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