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Research & Innovation

StrokeNet MOST

Clinical Trials

StrokeNet MOST

Multi-arm Optimization of Stroke Thrombolysis (MOST)

Physician & Study Coordinator

Study Coordinator

Aaron Calhoun




Synopsis: The MOST study is designed to find out whether adding one of two blood-thinning medicines (argatroban or eptifibatide) to standard treatment helps to decrease the impact of strokes and is safe. Earlier studies have shown that it seems safe and may be helpful to add argatroban or eptifibatide to tPA (standard treatment) to help dissolve clots causing stroke. Both are FDA-approved blood
thinners, but they are not approved for treating strokes. Using these medications with tPA is regulated by the US Food and Drug Administration (FDA) but not approved for standard treatment.


Inclusion Criteria
  1. Acute ischemic stroke patients
  2. Treated with 0.9mg/kg IV rt-PA within 3 hours of stroke onset or time last known well
  3. Age ≥ 18
  4. NIHSS score ≥ 6 prior to IV rt-PA
  5. Able to receive assigned study drug within 60 minutes of initiation of IV rt-PA


Exclusion Criteria
  1. Known allergy or hypersensitivity to argatroban or eptifibatide
  2. Previous stroke in the past 90 days
  3. Previous intracranial hemorrhage, neoplasm, subarachnoid hemorrhage, or arterial venous malformation
  4. Clinical presentation suggested a subarachnoid hemorrhage, even if initial CT scan was normal
  5. Surgery or biopsy of parenchymal organ in the past 30 days
  6. Trauma with internal injuries or ulcerative wounds in the past 30 days
  7. Severe head trauma in the past 90 days
  8. Systolic blood pressure >180mmHg post-IV rt-PA
  9. Diastolic blood pressure >105mmHg post-IV rt-PA
  10. Serious systemic hemorrhage in the past 30 days
  11. Known hereditary or acquired hemorrhagic diathesis, coagulation factor deficiency, or oral anticoagulant therapy with INR >1.5
  12. Positive urine pregnancy test for women of child bearing potential
  13. Glucose <50 or >400 mg/dl
  14. Platelets <100,000/mm3
  15. Hematocrit <25 %
  16. Elevated PTT above laboratory upper limit of normal
  17. Creatinine > 4 mg/dl
  18. Ongoing renal dialysis, regardless of creatinine
  19. Received Low Molecular Weight heparins (such as Dalteparin, Enoxaparin, Tinzaparin) in full dose within the previous 24 hours 
  20. Abnormal PTT within 48 hours prior to randomization after receiving heparin or a direct thrombin inhibitor (such as bivalirudin, argatroban, dabigatran or lepirudin) 
  21. Received Factor Xa inhibitors (such as Fondaparinaux, apixaban or rivaroxaban) within the past 48 hours
  22. Received glycoprotein IIb/IIIa inhibitors within the past 14 days
  23. Pre-existing neurological or psychiatric disease which confounded the neurological or functional evaluations e.g., baseline modified Rankin score >3
  24. Other serious, advanced, or terminal illness or any other condition that the investigator felt would pose a significant hazard to the patient if rt-PA, eptifibatide or argatroban therapy was initiated
    a. Example: known cirrhosis or clinically significant hepatic disease
  25. Current participation in another research drug treatment protocol - Subjects could not start another experimental agent until after 90 days
  26. Informed consent from the patient or the legally authorized representative was not or could not be obtained
  27. High density lesion consistent with hemorrhage of any degree
  28. Large (more than 1/3 of the middle cerebral artery) regions of clear hypodensity on the baseline CT Scan. Sulcal effacement and/or loss of grey-white differentiation alone are not contraindications for treatment