Try the modernized beta website. Learn more about the modernization effort.
Working… Menu

Angiomax in Patients With HIT/HITTS Type II Undergoing Off-Pump Coronary Artery Bypass Grafting (CABG) (CHOOSE)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00073580
Recruitment Status : Completed
First Posted : November 27, 2003
Last Update Posted : November 30, 2018
Information provided by (Responsible Party):
The Medicines Company

Brief Summary:
The purpose of this study is to examine the safety and efficacy of Angiomax as an anticoagulation in patients with heparin-induced thrombocytopenia (HIT)/heparin-induced thrombocytopenia with thrombosis syndrome (HITTS) undergoing off-pump coronary artery bypass (OPCAB) surgery.

Condition or disease Intervention/treatment Phase
Thrombocytopenia Thrombosis Cardiac Disease Coronary Artery Bypass Surgery Drug: Angiomax (bivalirudin) anticoagulant Phase 3

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 88 participants
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Angiomax in Patients With HIT/HITTS Type II Undergoing Off-PUMP CABG
Study Start Date : October 2003
Actual Primary Completion Date : September 2005

Intervention Details:
  • Drug: Angiomax (bivalirudin) anticoagulant
    ): 250 mg vial administered as 0.75 mg/kg intravenous (IV) bolus and 1.75 mg/kg/h IV infusion for the duration of the procedure with the option to increase or decrease the infusion rate in 0.25 mg/kg/h increments or to administer additional 0.1-0.5 mg/kg boluses to maintain an activated clotting time (ACT+) >300 seconds. A low-dose infusion could be administered in the preoperative phase (up to 48 hours before the procedure) and in the postoperative phase (up to 14 days after the procedure) as clinically indicated for management of HIT/TS. An initial dose of 0.1 mg/kg IV bolus followed by an IV infusion of 0.2 mg/kg/h titrated to a desired activated partial thromboplastin time (aPTT), eg, 1.5-2.5 times baseline aPTT, was recommended.
    Other Name: bivalirudin

Primary Outcome Measures :
  1. Primary Endpoint [ Time Frame: 7 days ]
    : In-hospital acute procedural success, defined as the absence of death, Q wave myocardial infarction (MI), repeat coronary revascularization, and stroke (hemorrhagic or ischemic) at hospital discharge or Day 7 after surgery ('Day 7/discharge'), whichever occurs first.

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No


  • Be at least 18 years of age.
  • Be accepted for OPCAB graft surgery (repeat CABG eligible)
  • New diagnosis or history of objectively documented HIT/HITTS Type II, defined as:

    1. Positive heparin-induced platelet aggregation (HIPA) or other functional assay for HIT or immunoassay for HIT antibodies (ELISA), AND/OR
    2. HIT: Thrombocytopenia associated with heparin therapy, where the platelet count has decreased by 50%, OR
    3. HITTS: Thrombocytopenia (as defined in B above) PLUS any arterial or venous thrombosis (Deep-vein thrombosis, pulmonary embolism, mesenteric venouse or arterial thrombosis, acute myocardial infarction, left ventricular thrombus, ischemic stroke, or occlusion of limb arteries) diagnosed by physical exam/lab evidence and/or appropriate imaging studies (duplex ultrasound, venography, ventilation-perfusion scan, venouse or arterial angiography, MRI/MRA, catheterization.)

Exclusion Criteria:

  • Confirmed pregnancy, by urine or serum pregnancy test (if woman of child-bearing potential).
  • Cerebrovascular accident within 6 months, or any cerebrovascular accident with a residual neurological deficit.
  • Intracranial neoplasm, arteriovenous malformation, or aneurysm.
  • Dependency on renal dialysis or creatinine clearance <30mL/min.
  • Ongoing treatment with warfarin (or other oral anticoagulant) at the time of enrollment.

Patients previously treated with warfarin may be enrolled if warfarin therapy can be safely discontinued and baseline INR is < 1.3 times control in the absence of heparin therapy.

  • Known allergy to Angiomax or hirudin derived drugs, or known sensitivity to any component of the product.
  • Patients receiving clopidogrel (Plavix®) within the previous 5 days may be enrolled if in the opinion of the Investigator the benefits of surgery outweigh the risk associated with recent clopidogrel administration.
  • Patients receiving a glycoprotein IIb/IIIa inhibitor within the previous 48 hours if abciximab (ReoPro®) or 12 hours if eptifibatide (Integrilin®) or tirofiban (Aggrastat®), may be enrolled if in the opinion of the investigator the benefits of surgery outweigh the risk associated with not waiting the 48 or 12 hour time period prior to enrollment.
  • Patients receiving lepirudin (Refludan®) or argatroban within the previous 24 hours prior to enrollment. Patients currently receiving lepirudin or argatroban can be enrolled if they are switched to Angiomax at least 24 hours prior to the contemplated OPCAB.
  • Patients receiving low molecular weight heparin (LMWH) or thrombolytics within the previous 12 hours may be enrolled if in the opinion of the Investigator the benefits of surgery outweigh the risk associated with not waiting the 12 hour time period.
  • Participation in other clinical research studies involving the evaluation of other investigational drugs or devices within 30 days of randomization.
  • Refusal to undergo blood transfusion should it become necessary.
  • Any other disease or condition, which, in the judgment of the investigator would place a patient at undue risk by being enrolled in the trial or inability to comply with study requirements.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00073580

Layout table for location information
United States, Ohio
The Cleveland Clinic
Cleveland, Ohio, United States, 44195
Sponsors and Collaborators
The Medicines Company
Layout table for investigator information
Study Director: Toval Rothschild, Ph.D. The Medicines Company
Layout table for additonal information
Responsible Party: The Medicines Company Identifier: NCT00073580    
Other Study ID Numbers: TMC-BIV-02-02
First Posted: November 27, 2003    Key Record Dates
Last Update Posted: November 30, 2018
Last Verified: November 2018
Keywords provided by The Medicines Company:
Coronary artery bypass surgery
Heparin-induced thrombocytopenia
Heparin-induced thrombocytopenia and thrombosis syndrome
Additional relevant MeSH terms:
Layout table for MeSH terms
Heart Diseases
Embolism and Thrombosis
Vascular Diseases
Cardiovascular Diseases
Blood Platelet Disorders
Hematologic Diseases
Serine Proteinase Inhibitors
Protease Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action
Fibrinolytic Agents
Fibrin Modulating Agents