Anticoagulant Therapy With Bivalirudin in the Performance of Percutaneous Coronary Intervention in Patients With Heparin-Induced Thrombocytopenia (AT BAT, First Inning)

Anticoagulant Therapy With Bivalirudin in the Performance of PCI in Patients With Heparin-Induced Thrombocytopenia

Primary Objective:

To assess the safety of bivalirudin as an alternative anticoagulant therapy for patients with new or previous heparin-induced thrombocytopenia (HIT) / heparin-induced thrombocytopenia and thrombosis syndrome (HITTS) undergoing percutaneous coronary intervention (PCI). This will be measured by the composite incidence of major bleeding events during administration or within 48 hours after stopping bivalirudin (or at hospital discharge, whichever occurs first). The components of the composite endpoint are: a) intracranial bleeding; b) retroperitoneal bleeding; c) bleeding that results in hemodynamic compromise; d) bleeding that requires transfusion of three or more units of whole blood or packed red cells; and e) a decrease in hemoglobin of greater than or equal to g/dL or in hematocrit of greater than or equal to 9%.

Secondary Objectives:

Each component of the primary composite endpoint.

To evaluate the level of anticoagulation achieved with bivalirudin. The goal is to achieve an activated clotting time (ACT) between 300 and 350 sec during PCI and 4-hour bivalirudin infusion.

To evaluate bivalirudin's effects on platelet counts.

Study Overview

• Status: Completed
• Conditions: Thrombosis; Heparin-Induced Thrombocytopenia
• Intervention / Treatment: Drug: bivalirudin

• Study Type: Interventional
• Enrollment (Actual): 50
• Phase: Phase 3

Contacts and Locations

Study Locations

• United States
  • North Carolina
    • Durham, North Carolina, United States
      • Duke Clinical Research Institute, Duke University Medical Center

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

INCLUSION:

• Males and females at least 18 years of age,
• Be able to provide written informed consent,
• Need anticoagulation for percutaneous coronary intervention (angioplasty, rotational atherectomy, directional coronary atherectomy, transluminal extraction catheter, or coronary stent),
• New diagnosis or history of clinically suspected or objectively documented HIT/HITTS, defined as:

(A) Positive heparin-induced platelet aggregation (HIPA) or other functional assay, defined as: (B) HIT: Thrombocytopenia associated with heparin therapy, where the platelet count: (i) has decreased to <100x10(9)/L (minimum of 30% drop from the platelet count before heparin treatment), OR (ii) has decreased to <150x10(9)/L (minimum of 40% drop from the platelet count before heparin treatment, OR, (C) HITTS: Thrombocytopenia (as defined above) PLUS arterial or venous thrombosis (deep-vein thrombosis, pulmonary embolism, mesenteric venous or arterial thrombosis, acute myocardial infarction, left ventricular thrombus, ischemic stroke, or occlusion or limb arteries), diagnosed by physical exam/lab evidence and/or appropriate imaging studies (duplex ultrasound, venography, ventilation-perfusion scan, venous or arterial angiography, MRI/MRA, catheterization).

EXCLUSION:

• Overt or known active significant bleeding,
• Definitive evidence of an alternative explanation for the thrombocytopenia (e.g.m DIC, sepsis, other consumptive coagulopathy, ITP, TTP, HUS, or bone-marrow failure),
• Coagulation disorder or bleeding diathesis unrelated to HIT/HITTS,
• Patients with renal impairment, defined as calculated creatinine clearance <30 mL/min, or any other medical conditions (including hepatic, pulmonary, gastrointestinal, endocrine, or psychiatric) that, in the investigator's opinion, would endanger the patient if she/he receives anticoagulant therapy,
• Nonhemorrhagic stroke within the past 6 months or any previous hemorrhagic stroke,
• Intracranial neoplasm, or cerebral/spinal arteriovenous malformation or aneurysm,
• Lumbar puncture, or spinal/epidural catheter placement within the past 7 days,
• Known prior hemorrhage (gastrointestinal, genitourinary, pericardia, pleural, retroperitoneal spaces), major surgery, or serious trauma within the past 6 weeks, unless attending physician believes the need for anticoagulation with PCI outweighs the potential bleeding risk,
• Puncture of a non-compressible vessel within 24 hours before the planned PCI,
• Confirmed uncontrolled hypertension (systolic blood pressure > or = 100 mmHg) at study entry,
• Ongoing anticoagulant therapy at study entry. However, patients may be entered if the therapy can be safely stopped periprocedurally, or, in the case of oral warfarin, if the prothrombin time INR can safely be brought to < or = 1.5 just before study drug infusion,
• Known or suspected pregnancy, or breast-feed. Women of childbearing potential must have a negative pregnancy test (urine or blood) and must be made explicitly aware that bivalirudin may cause excessive menstrual bleeding. Known or suspected pregnancy, or breast-feeding,
• Known hypersensitivity to bivalirudin or leech proteins,
• If the patient has participated in a drug trial within the past 48 hour, call the DCRI hotline.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Major bleeding events	composite incidence of major bleeding events during administration or within 48 hours after stopping bivalirudin	48 hours

Collaborators and Investigators

• Sponsor: The Medicines Company

Study record dates

Study Major Dates

• Study Start: April 1, 1999
• Primary Completion (Actual): February 1, 2003

Study Registration Dates

• First Submitted: August 14, 2002
• First Submitted That Met QC Criteria: August 15, 2002
• First Posted (Estimate): August 16, 2002

Study Record Updates

• Last Update Posted (Estimate): September 16, 2011
• Last Update Submitted That Met QC Criteria: September 15, 2011
• Last Verified: September 1, 2011

More Information

Terms related to this study

• Keywords: HIT; thrombosis; HIT/HITTS; bivalirudin; HITTS; direct thrombin inhibitor
• Additional Relevant MeSH Terms: Cardiovascular Diseases; Vascular Diseases; Hematologic Diseases; Embolism and Thrombosis; Blood Platelet Disorders; Thrombosis; Thrombocytopenia; Molecular Mechanisms of Pharmacological Action; Enzyme Inhibitors; Protease Inhibitors; Antithrombins; Serine Proteinase Inhibitors; Anticoagulants; Bivalirudin
• Other Study ID Numbers: TMC-98-10