Clinical trial Recruiting at 1 site Observational Ages 18 to 75

Evaluating microvascular reactivity in heart transplant patients

Official title: The Evolution of Systemic Microvascular Reactivity in Heart Transplant Patients

Run by National Institute of Cardiology, Laranjeiras, Brazil · NCT05729009 · Data updated 2026-11-12

This study looks at how blood flow in small blood vessels changes in heart transplant patients before and two years after their surgery to see if it can help predict long-term health issues.

Quick facts

Study typeObservational
Ages18 Years to 75 Years
SexAll
Enrollment31 (estimated)
SponsorNational Institute of Cardiology, Laranjeiras, Brazil
Government
Locations1 site (Rio de Janeiro)
StatusRecruiting
StartedOctober 1, 2022
Main results expectedDecember 2026
Study endsDecember 2026
Registry record updatedApril 13, 2026
Trial IDNCT05729009 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adult patients undergoing heart transplantation who can understand the study objectives and provide informed consent.

Probably not a fit

Patients who are pregnant, have acute infections, or use circulatory assistance devices may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study aims to assess the evolution of systemic microvascular reactivity in adult heart transplant patients before and two years after transplantation. Using non-invasive techniques such as laser speckle contrast imaging and acetylcholine iontophoresis, the study will evaluate skin microcirculation and correlate findings with clinical variables, hemodynamic, and echocardiographic data. The goal is to identify prognostic factors related to graft vascular disease, which is a leading cause of long-term mortality in heart transplant patients.

Why it matters

Potential benefit: If successful, this study could provide insights into cardiovascular physiology and improve non-invasive evaluation methods for heart transplant patients.

How similar studies have gone: While the approach of evaluating microvascular reactivity is established, the specific application in heart transplant patients is novel and not extensively tested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* capability to understand the objectives of the research and to fulfill the Term of Consent

Exclusion Criteria:

* Pregnancy, acute infection diagnosis, use of circulatory assistance devices

Where it's running

  • Eduardo Tibiriçá
    Rio de Janeiro, Brazil
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.