- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01246011
Significance of Antibodies to Heparin/Platelet Factor 4 Complex in Vein Graft Patency and Potential Role of Argatroban for Prevention of Vein Graft Occlusion
October 16, 2017 updated by: Ik-Kyung Jang, MD, PhD, Massachusetts General Hospital
Heparin/Platelet Factor 4 (PF4) antibody testing will be performed in subjects who have just undergone coronary artery bypass grafting (CABG) surgery.
30 subjects with a positive antibody result and no signs or symptoms of Heparin Induced Thrombocytopenia (HIT) will be randomized to receive argatroban and warfarin.
30 subjects with a positive antibody result and no signs or symptoms of HIT will be randomized to receive no treatment.
30 subjects with a negative antibody result will also be followed in the study.
All subjects will have a cardiac CT scan at about 30 days post surgery to measure the patency of their coronary artery bypass vein grafts.
This study will evaluate if treating patients who have heparin PF4 antibodies post-CABG with argatroban and warfarin has any effect on the short-term patency of coronary artery bypass vein grafts.
Study Overview
Status
Terminated
Intervention / Treatment
Detailed Description
This is a prospective, randomized, single center study.
Patients scheduled for CABG will be screened and enrolled.
Subjects positive for heparin/PF4 antibody within 24 h after CABG and without clinical suspicion of HIT will be randomized into one of two groups.
An additional 30 patients with negative antibody titers will serve as a control group.
Study Type
Interventional
Enrollment (Actual)
9
Phase
- Phase 4
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
Massachusetts
-
Boston, Massachusetts, United States, 02474
- Massachusetts General Hospital
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-
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
16 years and older (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Patients scheduled for CABG (males or non-pregnant females)
- > 18 years old with at least one vein graft planned
- Able to provide written informed consent
Exclusion Criteria:
- Patients who, in the investigator's or attending surgeon's opinion, are unsuitable for anticoagulation due to their clinical status
- Documented history of allergy to iodinated contrast media, warfarin, or argatroban
- Chronic renal impairment with CrCl<60 ml/min
- Recent bleeding episode
- Congestive Heart Failure (EF< 30%)
- Bleeding diathesis or known thrombophilic disorder
- Atrial fibrillation or other condition requiring anticoagulation at the time of enrollment
- Documented history of heparin induced thrombocytopenia
- Clinical suspicion of HIT at the time of randomization, defined as 50% decrease in Platelet count from last heparin exposure or Platelet count <100,000/ml
- Hepatic dysfunction (defined as LFTs > 3 times the upper limit of normal)
- Patients with a history of bleeding complications post-CABG
- Hemorrhagic stroke
- Gastrointestinal bleeding
- Requirement for fresh frozen plasma
- Recent central nervous system or ophthalmic surgery
- Aneurysm
- History of psychosis or senility
- Malignant hypertension
- Clinically significant pericarditis or pericardial effusion
- Bacterial endocarditis
- Hematocrit < 24%
- Valve replacement or repair at time of CABG
- Subjects with signs or symptoms of possible Transient Ischemic Attack or stroke
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: Other
- Allocation: Randomized
- Interventional Model: Factorial Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Heparin PF4 antibody positive -Drug (argatroban and warfarin)
Post-CABG heparin PF4 antibody positive with no signs or symptoms of HIT randomized to receive argatroban and warfarin
|
Subjects with the presence of heparin PF4 antibodies without signs or symptoms of HIT post CABG will be randomized to receive argatroban and warfarin or no drug for one month.
|
No Intervention: Heparin PF4 antibody positive no drug
Post-CABG heparin PF4 antibody positive with no signs or symptoms of HIT randomized to receive no medication
|
|
No Intervention: Heparin PF4 antibody negative
Post-CABG heparin PF4 antibody negative with no signs or symptoms of HIT randomized to receive no medication
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Coronary Artery Bypass Vein Graft Patency
Time Frame: Approximately 30 Days post CABG
|
Vein graft patency as measured by computed tomography
|
Approximately 30 Days post CABG
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Major Bleeding Events.
Time Frame: At 2weeks post CABG
|
Intracranial bleed or any clinically overt sign of hemorrhage that is associated with a fall in hemoglobin > 5 g/dL.
|
At 2weeks post CABG
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Collaborators
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
November 1, 2010
Primary Completion (Actual)
July 1, 2011
Study Completion (Actual)
July 1, 2011
Study Registration Dates
First Submitted
November 17, 2010
First Submitted That Met QC Criteria
November 19, 2010
First Posted (Estimate)
November 23, 2010
Study Record Updates
Last Update Posted (Actual)
November 17, 2017
Last Update Submitted That Met QC Criteria
October 16, 2017
Last Verified
October 1, 2017
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 2010P001386
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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