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New hope for chest pain without blocked arteries? early trial tests macitentan

NCT ID NCT07392281

Symptom relief Sponsor: China-Japan Friendship Hospital 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 a drug called macitentan in 40 adults with chest pain that isn't caused by blocked arteries (non-obstructive angina). The goal is to see if the drug improves blood flow in the tiny heart vessels and reduces chest pain. Participants will take macitentan for 4 weeks and have heart function tests and blood samples taken to understand how the drug works.

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

Early phase 1

The earliest testing in people: a first look at safety, in a very small group.

Participants

About 40 people

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

Started

Sep 2025

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 75 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: * Age 18-75 years old. * With typical angina symptoms. * Excluding obstructive coronary lesions (coronary stenosis ≤50% or FFR ≥0.8) by CAG. * Coronary microcirculatory function was confirmed via pressure wire-based thermodilution technique.（Patients were classified into subtypes based on coronary microcirculatory function indices: 1) Type I: CFR ≥ 2.5 and IMR \< 25; 2) Type II: CFR ≥ 2.5 and IMR ≥ 25; 3) Type III: CFR \< 2.5 and IMR \< 25; 4) Type IV: CFR \< 2.5 and IMR ≥ 25.） * Sign a written informed consent form. Exclusion Criteria: * Pregnant or lactating women. * History of heart attack within the last 90 days. * Severe heart disease (e.g., moderate to severe heart failure, severe heart valve disease). * Severe renal impairment (GFR \<30 ml/min/1.73m2). * Severe liver disease (Child-Pugh class C). * Moderately severe anaemia (haemoglobin concentration \<90 g/L). * Participation in another drug intervention trial study within the last 90 days.

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Conditions

The condition(s) this trial relates to.

coronary microvascular disorder

As listed by the trial registrant

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

Non-coronary obstructive angina

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

  • China-Japan Friendship Hospital

    RECRUITING

    Beijing, Beijing Municipality, 100029, China