Tailored Use of Tirofiban for Non-ST-elevation Acute Coronary Syndrome Patients

Overview

Investigators aimed to test the beneficial effect of tirofiban, a GPIIb/IIIa antagonist, for Non-ST-Elevation Acute Coronary Syndrome Patients who has high resistance to clopidogrel.

Full Title of Study: “Effect of Tailored Use of Tirofiban in Patients With Non-ST-elevation Acute Coronary Syndrome Undergoing Percutaneous Coronary Intervention”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: Double (Participant, Care Provider)
  • Study Primary Completion Date: October 1, 2015

Detailed Description

Some patients have a poor response to dual antiplatelet therapy (DAPT), and it can result in a poor prognosis after percutaneous coronary intervention (PCI). Devices like Ultegra Rapid Platelet Function Analyzer (VerifyNow®) enable us to quantify platelet reactivity quickly in the catheter laboratory. This means that the poor responders to DAPT can be identified, and the patients' outcomes can be improved by providing additional antiplatelet agents. Tirofiban, a GP IIb/IIIa inhibitor, is a potent antiplatelet agent which is recommended for Non-ST-Elevation acute coronary syndrome (NSTE-ACS) with high risk at presentation. However, its role is not clear for patients stabilized with standard medical treatment but with a poor responsiveness to DAPT. In this study, Investigators administered tirofiban on top of DAPT to patients with NSTE-ACS undergoing PCI who have a high platelet reactivity (HPR) identified by VerifyNow. To the best of our knowledge, there are few studies conducted with tirofiban for tailored antiplatelet therapy. Moreover, this is the first randomized study with NSTE-ACS patients for tailored use of tirofiban under the guidance of platelet reactivity.

Interventions

  • Drug: Tirofiban

Arms, Groups and Cohorts

  • Experimental: Group A (high platelet reactivity – tirofiban)
    • Patients with high platelet reactivity unit (230 or higher) Tirofiban administered dose: 0.4 μg/kg/min continuous infusion for 30 min and then 0.10 μg/kg/min continuous infusion for 12 h
  • No Intervention: Control C1 (high platelet reactivity – no tirofiban)
    • Patients with high platelet reactivity unit (230 or higher) Tirofiban was not administered
  • No Intervention: Control C2 (low platelet reactivity – no tirofiban)
    • Patients with low platelet reactivity unit (less than 230) Tirofiban was not administered

Clinical Trial Outcome Measures

Primary Measures

  • Area Under Curve of Serial Cardiac Biomarkers
    • Time Frame: 0,6,12,18,24,30,36 hours
    • An area under the curve of serial levels of Troponin I and creatine kinase-MB isoenzyme during 36 hours

Secondary Measures

  • Percentage of Participants With Periprocedural Myonecrosis
    • Time Frame: 0,6,12,18,24,30,36 hours
    • Percentage of participants with periprocedural myonecrosis under the criteria described below. When the cardiac biomarkers before the procedure were within the 99th percentile upper reference limit (URL), more than a 5-fold elevation in the URL within 12 hours after percutaneous coronary intervention (PCI) was defined as periprocedural myonecrosis. If the cardiac biomarker level was already above the 99th percentile URL before the procedure and the trend was stationary or decreasing, a ≥20% increase compared to the previous level was considered periprocedural myonecrosis. If the trend was still increasing, the levels at the post-6 hour and 12-hour were compared to determine periprocedural myonecrosis.

Participating in This Clinical Trial

Inclusion Criteria

  • diagnosed with NSTE-ACS who need PCI – loaded with aspirin and clopidogrel at least 6 h before the procedure Exclusion Criteria:

  • thrombocytopenia (platelet count <100,000/μL) – history of hemorrhagic stroke – history of ischemic stroke in the recent 2 year – history of major surgery 6 months prior

Gender Eligibility: All

Minimum Age: 19 Years

Maximum Age: 85 Years

Are Healthy Volunteers Accepted: No

Investigator Details

  • Lead Sponsor
    • Seoul National University Bundang Hospital
  • Provider of Information About this Clinical Study
    • Principal Investigator: Tae-Jin Youn, Professor, Cardiovascular Center – Seoul National University Bundang Hospital
  • Overall Official(s)
    • Tae-Jin Youn, PhD, Principal Investigator, Seoul National University Bundang Hospital

Citations Reporting on Results

Patti G, Nusca A, Mangiacapra F, Gatto L, D'Ambrosio A, Di Sciascio G. Point-of-care measurement of clopidogrel responsiveness predicts clinical outcome in patients undergoing percutaneous coronary intervention results of the ARMYDA-PRO (Antiplatelet therapy for Reduction of MYocardial Damage during Angioplasty-Platelet Reactivity Predicts Outcome) study. J Am Coll Cardiol. 2008 Sep 30;52(14):1128-33. doi: 10.1016/j.jacc.2008.06.038.

Hong MK, Mehran R, Dangas G, Mintz GS, Lansky AJ, Pichard AD, Kent KM, Satler LF, Stone GW, Leon MB. Creatine kinase-MB enzyme elevation following successful saphenous vein graft intervention is associated with late mortality. Circulation. 1999 Dec 14;100(24):2400-5. doi: 10.1161/01.cir.100.24.2400.

Fung AY, Saw J, Starovoytov A, Densem C, Jokhi P, Walsh SJ, Fox RS, Humphries KH, Aymong E, Ricci DR, Webb JG, Hamburger JN, Carere RG, Buller CE. Abbreviated infusion of eptifibatide after successful coronary intervention The BRIEF-PCI (Brief Infusion of Eptifibatide Following Percutaneous Coronary Intervention) randomized trial. J Am Coll Cardiol. 2009 Mar 10;53(10):837-45. doi: 10.1016/j.jacc.2008.09.060.

De Labriolle A, Lemesle G, Bonello L, Syed AI, Collins SD, Ben-Dor I, Pinto Slottow TL, Xue Z, Torguson R, Suddath WO, Satler LF, Kent KM, Pichard AD, Lindsay J, Waksman R. Prognostic significance of small troponin I rise after a successful elective percutaneous coronary intervention of a native artery. Am J Cardiol. 2009 Mar 1;103(5):639-45. doi: 10.1016/j.amjcard.2008.10.044. Epub 2009 Jan 17.

Jeremias A, Kleiman NS, Nassif D, Hsieh WH, Pencina M, Maresh K, Parikh M, Cutlip DE, Waksman R, Goldberg S, Berger PB, Cohen DJ; Evaluation of Drug Eluting Stents and Ischemic Events (EVENT) Registry Investigators. Prevalence and prognostic significance of preprocedural cardiac troponin elevation among patients with stable coronary artery disease undergoing percutaneous coronary intervention: results from the evaluation of drug eluting stents and ischemic events registry. Circulation. 2008 Aug 5;118(6):632-8. doi: 10.1161/CIRCULATIONAHA.107.752428. Epub 2008 Jul 21.

Cuisset T, Hamilos M, Sarma J, Sarno G, Wyffels E, Vanderheyden M, Barbato E, Bartunek J, De Bruyne B, Wijns W. Relation of low response to clopidogrel assessed with point-of-care assay to periprocedural myonecrosis in patients undergoing elective coronary stenting for stable angina pectoris. Am J Cardiol. 2008 Jun 15;101(12):1700-3. doi: 10.1016/j.amjcard.2008.02.054. Epub 2008 Apr 18.

Suh JW, Lee SP, Park KW, Lee HY, Kang HJ, Koo BK, Cho YS, Youn TJ, Chae IH, Choi DJ, Rha SW, Bae JH, Kwon TG, Bae JW, Cho MC, Kim HS. Multicenter randomized trial evaluating the efficacy of cilostazol on ischemic vascular complications after drug-eluting stent implantation for coronary heart disease: results of the CILON-T (influence of CILostazol-based triple antiplatelet therapy ON ischemic complication after drug-eluting stenT implantation) trial. J Am Coll Cardiol. 2011 Jan 18;57(3):280-9. doi: 10.1016/j.jacc.2010.08.631.

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