Estimation of the Prevalence of Microcirculatory Dysfunction in Uremic Cardiopathy Among Dialysis Patients (PRE-COCO)

May 20, 2026 updated by: Centre Hospitalier Departemental Vendee
Patients with end-stage renal disease have a high burden of cardiovascular mortality, yet ischemic heart disease is often asymptomatic and difficult to diagnose in this population. Recent data suggest that microvascular coronary dysfunction may contribute significantly to myocardial ischemia in dialysis patients, but its true prevalence remains unknown. This study aims to evaluate microcirculatory coronary impairment in hemodialysis patients using invasive coronary angiography with measurement of coronary flow reserve (CFR), index of microcirculatory resistance (IMR). The study will also describe the clinical and biological characteristics associated with microvascular dysfunction in this population, in order to better understand the mechanisms of uremic cardiomyopathy and improve cardiovascular risk stratification.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

30

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Age ≥ 18 years
  • Patients who have been on haemodialysis for at least 6 months
  • Elevated troponin levels > 40 ng/L in a sample taken whilst the patient was in a stable condition, dated within the last 3 months
  • Patients capable of understanding the protocol and who have given their written informed consent to participate in the research
  • Patients registered with the National Health Service or eligible for it

Exclusion Criteria:

  • Age > 90 years
  • Patient undergoing daily home haemodialysis
  • Symptomatic stage 3 or 4 peripheral arterial disease
  • Severe hypertrophic cardiomyopathy (genetic or amyloid)
  • Severe valvular heart disease leading to left ventricular remodelling (surgically contraindicated severe aortic stenosis, severe mitral regurgitation, severe aortic regurgitation)
  • Hospitalisation for decompensation/acute heart failure within the last month
  • Acute coronary syndrome and any coronary artery disease requiring angioplasty and/or stent implantation within the last 3 months
  • Contraindication to METHERGIN and DOBUTAMINE
  • Patients participating in another clinical research protocol that may affect the research objectives
  • Patients already included in the study
  • Patients under guardianship, curatorship or deprived of their liberty
  • Patients under an activated future protection order
  • Patients under family authorisation
  • Patient under judicial protection
  • Pregnant patient

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Screening
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Percentage of patients with microcirculatory heart disease (i.e. microvascular dysfunction or microvascular vasospasm) identified during coronary angiography
Time Frame: Cardiac examinations to be carried out within 8 to 10 weeks of enrolment
Cardiac examinations to be carried out within 8 to 10 weeks of enrolment

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Centre Hospitalier Departemental Vendee

Investigators

  • Principal Investigator: Grégoire COUVRAT-DESVERGNES, Centre Hospitalier Départemental Vendée

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

September 1, 2027

Primary Completion (Estimated)

June 1, 2028

Study Completion (Estimated)

September 1, 2028

Study Registration Dates

First Submitted

May 20, 2026

First Submitted That Met QC Criteria

May 20, 2026

First Posted (Actual)

May 27, 2026

Study Record Updates

Last Update Posted (Actual)

May 27, 2026

Last Update Submitted That Met QC Criteria

May 20, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • CHD24_0002

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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