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Coronary Microvascular Dysfunction (CMD)FlashVNCT06945094

A Multi-center, Real-World Clinical Trial of caIMR on Two Specific Kinds of Patients.

An observational study of Coronary Microvascular Dysfunction (CMD) and Stable Angina Pectoris, run by Ge Junbo.

Not yet recruiting

Opening soon. The study is approved but enrolment has not started yet. Sites may already take enquiries.

Sites and contacts
Official record
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Trial summary

The coronary angiography-derived index of microcirculatory resistance (caIMR) can be used to provide a binary assessment whether patients(with stable angina, unstable angina, suspected myocardial ischemia, or coronary artery stenosis of less than 50%, and without cardiomyopathy or obstructive epicardial coronary… Read more about this study

Who is it for?
Ages 18 to 80 years
What is being tested?
caIMR
Type of treatment
Medical device
How many people
508 participants
Where
No sites listed yet
Study dates
1 Jul 2025to 30 Dec 2029
Phase
Observational
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 80 years
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Study population: This study will enroll patients with stable angina, unstable angina, suspected myocardial ischemia, or coronary artery stenosis of less than 50%, who do not have cardiomyopathy or obstructive epicardial coronary artery disease. Specifically, we will focus on two groups: (1) patients with caIMR values between 20 and 30, and (2) patients with diffuse disease.

Who may be able to join

  • Age between 18 and 80 years, regardless of gender;
  • Diagnosed with stable angina, unstable angina, or suspected myocardial ischemia;
  • targeted vessel stenosis < 50% and caIMR values between 20 and 30; or
  • Targeted vessel stenosis < 50%, but with lesion length > 20 mm and caFFR > 0.8, representing diffuse disease.

Who cannot join

  • Previously undergone percutaneous coronary intervention (PCI);
  • History of heart failure or myocardial infarction;
  • Acute myocardial infarction;
  • Primary or secondary cardiomyopathy;
  • Primary or secondary severe valvular heart disease;
  • Severe systemic infections;
Show all 9Show fewer
  • Malignant cachectic diseases and an estimated survival of less than one year;
  • Patients who are currently participating in other clinical trials involving drugs or devices and have not yet reached the primary endpoint of those trials;
  • Patients whom the investigator deems to have other conditions that make them unsuitable for participation in the clinical trial.

Trial locations and contacts

No sites are listed yet. Contact the study team or a site near you to ask about taking part.

About this study

Official title: A Multi-center, Real-World Clinical Trial on Assessment of Microcirculatory Status Using Online Coronary Angiography-Derived Index of Microcirculatory Resistance (caIMR) (Flash V)

The coronary angiography-derived index of microcirculatory resistance (caIMR) can be used to provide a binary assessment whether patients(with stable angina, unstable angina, suspected myocardial ischemia, or coronary artery stenosis of less than 50%, and without cardiomyopathy or obstructive epicardial coronary artery disease) have microcirculatory dysfunction, using a cutoff value of 25.

This study aims to evaluate the binary classification performance of caIMR in two specific groups of patients: (1) those with caIMR values between 20 and 30, and (2) those with diffuse disease. We will do this by looking at differences in their Seattle Angina Questionnaire (SAQ) scores and their health outcomes over a three-year period.

Read the detailed description

The coronary angiography-derived index of microcirculatory resistance (caIMR) is a novel, non-invasive, imaging-based functional index for diagnosing coronary microvascular disease, which has been clinically validated for market release. It can be used to provide a binary assessment of whether patients with stable angina, unstable angina, suspected myocardial ischemia, or coronary artery stenosis of less than 50% (without cardiomyopathy or obstructive epicardial coronary artery disease) have microcirculatory dysfunction, using a cutoff value of 25.

This trial is a prospective, multicenter, observational real-world study. We will regularly collect clinical diagnostic data (including angiographic images) patients who undergo caIMR measurement using the Coronary Artery Functional Measurement System and single-use pressure sensors as part of their routine medical care. After verifying the inclusion and exclusion criteria, patients who meet the inclusion criteria and do not meet the exclusion criteria will be enrolled in this trial.

The primary objective of this trial is to evaluate the binary classification performance of caIMR by comparing patients' Seattle Angina Questionnaire (SAQ) scores before the procedure and at six months post-procedure in two specific groups of patients: :

  1. Assessing the binary classification performance of caIMR in patients with values between 20 and 30.
  2. Assessing the binary classification performance of caIMR in patients with diffuse disease.

The secondary objective is to validate the prognostic value of caIMR in these two groups of patients based on the occurrence of major adverse cardiovascular events (MACE) over a three-year period.

Being tested
caIMR
Keywords
Hemodynamics, Computational fluid dynamics, Angiography-derived IMR, coronary microvascular dysfunction, stable and unstable angina
Medical subject headings
Angina, Stable, Angina, Unstable, Myocardial Ischemia, Angina Pectoris

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • caIMRDevice

    caIMR will be measured by pressure sensors which are produced by Suzhou Rainmed Medical Technology Co., Ltd.

    caIMR is calculated based on angiography images and Hyperemic Pa estimated from resting Pa according to prespecified equation

Study groups in NCT06945094
Study groupRoleWhat they receive
Grey zone patientsPatients with caIMR values between 20 and 30 can be enrolled in this group, a total of 254 patients of this type will be enrolled in the study.The binary classification performance of caIMR will be validated based on differences in their Seattle Angina Questionnaire (SAQ) scores and their health outcomes.
Receives: Device: caIMR
Diffuse disease patients.Patients with diffuse coronary disease and less than 50% stenosis can be enrolled in this group, a total of 254 patients of this type will be enrolled in the study. CaIMR will be assessed in these patients, and its binary classification performance will be validated based on differences in their Seattle Angina Questionnaire (SAQ) scores and their health outcomes.
Receives: Device: caIMR

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Patients' Seattle Angina Questionnaire (SAQ) scores

    The Seattle Angina Questionnaire (SAQ) is a rigorously validated disease-specific health status assessment tool widely used to evaluate symptoms, functional status, and quality of life in patients with coronary artery disease (CAD). Utilizing the SAQ as an endpoint in clinical trials ensures the scientific validity and comparability of study results, providing valuable insights for clinical practice.

    Measured: Before the procedure and six months post-procedure.

Secondary outcomes (1)
  1. MACE (Major Adverse Cardiovascular Events)

    It is defined as a composite endpoint including cardiovascular death, target vessel revascularization, myocardial infarction, rehospitalization for angina, heart failure, and stroke.

    Measured: At 6 months, 1 year, 2 years, and 3 years post-procedure.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted25 Apr 2025
  2. Study start1 Jul 2025 (estimated)
  3. Primary completion30 Dec 2027 (estimated)
  4. Study completion30 Dec 2029 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
Observational model
Other
Time perspective
Prospective
Enrolment
508 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT06945094
Sponsor's protocol ID
FlashV
Acronym
FlashV
Status last verified
Apr 2025
First submitted
18 Apr 2025
Last updated
27 Apr 2025
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
Undecided

Publications

  • Ford TJ, Stanley B, Good R, Rocchiccioli P, McEntegart M, Watkins S, Eteiba H, Shaukat A, Lindsay M, Robertson K, Hood S, McGeoch R, McDade R, Yii E, Sidik N, McCartney P, Corcoran D, Collison D, Rush C, McConnachie A, Touyz RM, Oldroyd KG, Berry C. Stratified Medical Therapy Using Invasive Coronary Function Testing in Angina: The CorMicA Trial. J Am Coll Cardiol. 2018 Dec 11;72(23 Pt A):2841-2855. doi: 10.1016/j.jacc.2018.09.006. Epub 2018 Sep 25.

    PubMed 30266608
  • Chan PS, Jones PG, Arnold SA, Spertus JA. Development and validation of a short version of the Seattle angina questionnaire. Circ Cardiovasc Qual Outcomes. 2014 Sep;7(5):640-7. doi: 10.1161/CIRCOUTCOMES.114.000967. Epub 2014 Sep 2.

    PubMed 25185249
  • Kunadian V, Chieffo A, Camici PG, Berry C, Escaned J, Maas AHEM, Prescott E, Karam N, Appelman Y, Fraccaro C, Louise Buchanan G, Manzo-Silberman S, Al-Lamee R, Regar E, Lansky A, Abbott JD, Badimon L, Duncker DJ, Mehran R, Capodanno D, Baumbach A. An EAPCI Expert Consensus Document on Ischaemia with Non-Obstructive Coronary Arteries in Collaboration with European Society of Cardiology Working Group on Coronary Pathophysiology & Microcirculation Endorsed by Coronary Vasomotor Disorders International Study Group. Eur Heart J. 2020 Oct 1;41(37):3504-3520. doi: 10.1093/eurheartj/ehaa503.

    PubMed 32626906
  • Sara JD, Widmer RJ, Matsuzawa Y, Lennon RJ, Lerman LO, Lerman A. Prevalence of Coronary Microvascular Dysfunction Among Patients With Chest Pain and Nonobstructive Coronary Artery Disease. JACC Cardiovasc Interv. 2015 Sep;8(11):1445-1453. doi: 10.1016/j.jcin.2015.06.017.

    PubMed 26404197
  • Liu L, Abdu FA, Yin G, Xu B, Mohammed AQ, Xu S, Lv X, Luo Y, Zu L, Yang C, Zhang Z, Zhou Y, Cai H, Lv Z, Xu Y, Che W. Prognostic value of myocardial perfusion imaging with D-SPECT camera in patients with ischemia and no obstructive coronary artery disease (INOCA). J Nucl Cardiol. 2021 Dec;28(6):3025-3037. doi: 10.1007/s12350-020-02252-8. Epub 2020 Sep 30.

    PubMed 33000403
  • Radico F, Zimarino M, Fulgenzi F, Ricci F, Di Nicola M, Jespersen L, Chang SM, Humphries KH, Marzilli M, De Caterina R. Determinants of long-term clinical outcomes in patients with angina but without obstructive coronary artery disease: a systematic review and meta-analysis. Eur Heart J. 2018 Jun 14;39(23):2135-2146. doi: 10.1093/eurheartj/ehy185.

    PubMed 29688324
  • Zhang D, Lv S, Song X, Yuan F, Xu F, Zhang M, Yan S, Cao X. Fractional flow reserve versus angiography for guiding percutaneous coronary intervention: a meta-analysis. Heart. 2015 Mar;101(6):455-62. doi: 10.1136/heartjnl-2014-306578. Epub 2015 Jan 30.

    PubMed 25637372
  • Huang D, Gong Y, Fan Y, Zheng B, Lu Z, Li J, Huo Y, Escaned J, Huo Y, Ge J. Coronary angiography-derived index for assessing microcirculatory resistance in patients with non-obstructed vessels: The FLASH IMR study. Am Heart J. 2023 Sep;263:56-63. doi: 10.1016/j.ahj.2023.03.016. Epub 2023 Apr 12.

    PubMed 37054908
  • Li J, Gong Y, Wang W, Yang Q, Liu B, Lu Y, Xu Y, Huo Y, Yi T, Liu J, Li Y, Xu S, Zhao L, Ali ZA, Huo Y. Accuracy of computational pressure-fluid dynamics applied to coronary angiography to derive fractional flow reserve: FLASH FFR. Cardiovasc Res. 2020 Jun 1;116(7):1349-1356. doi: 10.1093/cvr/cvz289.

    PubMed 31693092

Questions about this trial

What is this clinical trial studying?

An observational study of Coronary Microvascular Dysfunction (CMD) and Stable Angina Pectoris, run by Ge Junbo.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 4 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: opening soon, as of the sponsor's last update on 27 Apr 2025. Status can change between updates, so confirm with the study contact before making plans.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

Contact Dong Huang, Doctor (+8618124009136, huang.dong@zs-hospital.sh.cn), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Patients' Seattle Angina Questionnaire (SAQ) scores (time frame: Before the procedure and six months post-procedure.). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT06945094, which also lists 9 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Apr 2025.

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