Plain-English translation of NCT04440761 on ClinicalTrials.gov ↗ · Source last updated · Translation generated · How we translate trials
This is a research registry—a long-term database—that collects medical information from patients diagnosed with a heart attack that doesn't have a clear cause, even after tests show their main heart arteries look normal. Researchers are studying these patients to understand why heart attacks happen in some people without typical artery blockages, and to learn which tests and treatments work best. You would participate simply by allowing your routine hospital records to be included in this database.
Heart attacks can happen to people whose coronary arteries appear healthy on standard tests, which confuses doctors about the underlying cause. This study exists to gather real-world information about these puzzling cases so doctors can better diagnose, understand, and treat patients in the future.
You likely qualify if…
You likely don't qualify if…
You don't need to do anything special. Researchers will collect information from your routine hospital visits and medical records—the same care you're already receiving. Your data will be anonymized (your name and personal details removed) before researchers use it. There are no extra appointments, tests, or procedures required just for this study.
AI-generated summary from trial data · Jun 2, 2026 · Not medical advice
United Kingdom
Enrollment target
~3,000 participants
Started
July 2020
Primary completion
September 2026
Age range
16 Years and older
Last updated on clinicaltrials.gov in November 2025.
Reach out to the team running this trial. Response times vary — some teams are faster than others.
Central contact
Daniel Jones, MBBS, PhD
Queen Mary University of London
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.