Plain-English translation of NCT06503640 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
This is an observational study — meaning researchers will observe and follow patients rather than test a new medication. If you have chest pain but your heart's main arteries are normal, researchers want to understand whether problems in your heart's smallest blood vessels (called microvascular dysfunction) are causing your symptoms and how this might affect your long-term health.
Many patients experience chest pain even though their main coronary arteries appear healthy on standard tests. Doctors believe tiny blood vessels in the heart may be the culprit, but they don't yet fully understand how common this problem is or what it means for patients' futures. This study aims to fill that gap.
You likely qualify if…
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As a participant, you will likely undergo specialized heart imaging tests (including measurements of blood flow in your heart's small vessels) to assess how well your microvascular function is working. Researchers will collect information about your symptoms and health history, then follow up with you over time to see how you progress and whether microvascular problems predict future heart-related events.
AI-generated summary from trial data · Jun 2, 2026 · Not medical advice
China
Sponsor
China-Japan Friendship Hospital
Enrollment target
~100 participants
Started
July 2023
Primary completion
December 2024
This trial's estimated completion date has passed — the record may not be fully up to date.
Age range
18 Years and older
Last updated on clinicaltrials.gov in July 2024.
Reach out to the team running this trial. Response times vary — some teams are faster than others.
Central contact
Zhaoxue Sheng, Doctor
China-Japan Friendship Hospital
Tell us you're interested and we'll help connect you with the research team. We'll walk you through what to expect first — no email needed to get started.