Comparing Heparin and Placebo in Patients Undergoing Cardiac Catheterization

A Randomized Trial of Heparin vs Placebo in Patients Undergoing Cardiac Catheterization Via the Trans-radial Approach

PHASE3 · London Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's · NCT04374799

This study is testing whether different doses of heparin can help prevent complications like bruising and artery blockage in patients getting a heart procedure through their wrist.

Quick facts

PhasePHASE3
Study typeInterventional
Enrollment1623 (estimated)
Ages18 Years and up
SexAll
SponsorLondon Health Sciences Centre Research Institute OR Lawson Research Institute of St. Joseph's (other)
Locations2 sites (Hamilton, Ontario and 1 other locations)
Trial IDNCT04374799 on ClinicalTrials.gov

What this trial studies

This clinical trial investigates the effects of different doses of heparin compared to a placebo in patients undergoing diagnostic cardiac catheterization via the trans-radial approach. Participants will be randomly assigned to receive either low-dose heparin, high-dose heparin, or a saline placebo. The study aims to assess the incidence of hematoma and radial artery occlusion following the procedure. By evaluating these outcomes, the trial seeks to determine the optimal anticoagulation strategy for this patient population.

Who should consider this trial

Good fit: Ideal candidates include patients scheduled for diagnostic cardiac catheterization with a small size sheath and normal ulno-palmar circulation.

Not a fit: Patients with abnormal ulno-palmar circulation, prior radial artery thrombosis, or those requiring anticoagulation may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved safety and outcomes for patients undergoing cardiac catheterization.

How similar studies have performed: Other studies have explored anticoagulation strategies in cardiac procedures, suggesting potential benefits, but this specific approach is being tested for the first time.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* diagnostic cardiac catheterization; Small size sheath; patency of the ulno-palmar circulation

Exclusion Criteria:

abnormal ulno-palmar circulation; Prior radial artery thrombosis; Prior surgery close to the access site; Emergent cardiac catheterization; History of HIT or allergy to heparin; Patients requiring anticoagulation

Where this trial is running

Hamilton, Ontario and 1 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Cardiac Disease

Last reviewed 2026-05-15 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.